Journal articles: 'Apparent molar volumes'

1

Sakurai, Masao, Kunio Nakamura, and Nobuo Takenaka. "Apparent Molar Volumes and Apparent Molar Adiabatic Compressions of Water in Some Alcohols." Bulletin of the Chemical Society of Japan 67, no. 2 (1994): 352–59. http://dx.doi.org/10.1246/bcsj.67.352.

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Kumar, D. "Apparent molar volume of some ω-amino acids in aqueous electrolyte systems". Canadian Journal of Chemistry 77, № 7 (1999): 1288–94. http://dx.doi.org/10.1139/v99-117.

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Apparent molar volumes (Vϕ) of some ω-amino acids have been determined in aqueous guanidine hydrochloride (6 m GuHCl) and sodium sulphate (2 m Na2SO4) solutions at 288.15 and 298.15 K using a vibrating tube digital densimeter. The transfer volumes of amino acids from water to aqueous electrolyte systems have been reported. The transfer properties are interpreted in terms of strong interactions, based on a cosphere overlap model of guanidine hydrochloride/sodium sulphate molecules with the charged centers of the zwitterions (amino acid molecules), as compared to ion - nonpolar group interactions.Key words: amino acids, denaturation, guanidine hydrochloride, sodium sulphate, apparent molar volume, zwitterions, limiting apparent molar volume.

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Kipkemboi, Pius K., and Allan J. Easteal. "Densities and viscosities of binary aqueous mixtures of nonelectrolytes: tert-Butyl alcohol and tert-butylamine." Canadian Journal of Chemistry 72, no. 9 (1994): 1937–45. http://dx.doi.org/10.1139/v94-247.

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The density and shear viscosity of mixtures of tert-butyl alcohol (BuOH) and tert-butylamine (TBA) with water have been determined for various temperatures (288 to 318 K for H2O + BuOH and 288 to 308 K for H2O + TBA) over the whole composition range. Excess molar volumes and apparent molar volumes of the components of each system were calculated from the density data. In both systems the apparent molar volume of the organic component passes through a minimum in the water-rich region. Both systems exhibit large negative excess molar volumes which are essentially independent of temperature at all compositions. The two systems show pronounced maxima in their shear viscosity isotherms.

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4

Amalendu, Pal, and Kumar Suresh. "Apparent molar volumes of L-glycine in aqueous glucose solutions at different temperatures." Journal of Indian Chemical Society Vol. 79, Nov 2002 (2002): 866–70. https://doi.org/10.5281/zenodo.5847701.

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Department of Chemistry, Kurukshetra University, Kurukshetra-136 119, India E-mail : search@vidya.kuk.ernet.in                  Fax : 91-1744-38277 Manuscript received 22 April 2002, accepted 16 July 2002 Densities of L-glycine have measured at 288.15, 298.15 and 308.15 Kin aqueous glucose solutions ranging from pure water to 25% glucose by mass. From these densities, apparent molar volumes and limiting apparent molar volumes of L-glycine in various aqueous glucose solutions ban been evaluated. Transfer volumes and the infinite dilution partial molar expansibilities have been calculated from the temperature dependence of the limiting apparent molar volumes. The result are interpreted from the point of view of solute-solute interactions involving solvent effects.

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5

Debashis, Das. "A study on volumetric and compressibility properties of some lithium salts in tetrahydrofuran at 298.15 K." Journal of Indian Chemical Society Vol. 88, May 2011 (2011): 731–33. https://doi.org/10.5281/zenodo.5791863.

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Department of Chemistry, Dinhata College, Dinhata-736 135, Cooch-Behar, West Bengal, India E-mail : debu _nbu@rediffmail.com Manuscript received 01 February 2010, revised 27 September 2010, accepted 05 October 2010 Apparent molar volumes (Vɸ) and apparent molar adiabatic compressibilitics (ɸK) have been determined for solutions of some lithium salts (LiCI, LiBr, LiCIO4 and LiBF4) in tetrahydrofuran at 298.15 K from density and sound velocity measurements. Vɸ0 and ɸK0 of the sale have been obtained from Vɸ- $\sqrt{{C}}$ and ɸK - $\sqrt{{C}}$ data. The data have been quantitatively explained in terms of ion-solvent and ion-ion interactions.

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Kundu, Agnita, and Nand Kishore. "Apparent Molar Heat Capacities and Apparent Molar Volumes of Aqueous Nicotinamide at Different Temperatures." Journal of Solution Chemistry 32, no. 8 (2003): 703–17. http://dx.doi.org/10.1023/b:josl.0000002990.73945.c9.

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Omar, Qazi Mohammed, Jean-Noël Jaubert, and Javeed A. Awan. "Densities, Apparent Molar Volume, Expansivities, Hepler’s Constant, and Isobaric Thermal Expansion Coefficients of the Binary Mixtures of Piperazine with Water, Methanol, and Acetone at T = 293.15 to 328.15 K." International Journal of Chemical Engineering 2018 (November 14, 2018): 1–10. http://dx.doi.org/10.1155/2018/8689534.

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The properties of 3 binary mixtures containing piperazine were investigated in this work. In a first step, the densities for the two binary mixtures (piperazine + methanol) and (piperazine + acetone) were measured in the temperature range of 293.15 to 328.15 K and 293.15 to 323.15 K, respectively, at atmospheric pressure by using a Rudolph research analytical density meter (DDM 2911). The concentration of piperazine in the (piperazine + methanol) mixture was varied from 0.6978 to 14.007 mol/kg, and the concentration of piperazine in the (piperazine + acetone) mixture was varied from 0.3478 to 1.8834 mol/kg. On the other hand, the density data for the (piperazine + water) mixture were taken from the literature in the temperature range of 298.15 to 328.15 K. In a second step, for the 3 investigated systems, the apparent molar volume (Vϕ) and the limiting apparent molar volume (Vϕ0) at infinite dilution were calculated using the Redlich–Mayer equation. The limiting apparent molar volumes (Vϕ0) were used to study the influence of the solute-solvent and solute-solute interactions. The temperature dependency of the apparent molar volumes was used to estimate the apparent molar expansibility, Hepler’s constant ∂2Vϕ0/∂T2P, and isobaric thermal expansion coefficients αP.

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8

Bouguerra, Sabah, Hamed Bahri, and Pierre Letellier. "Volumes molaires partiels de composés tensioactifs dans les milieux salins concentrés eau–KCl." Canadian Journal of Chemistry 63, no. 9 (1985): 2476–80. http://dx.doi.org/10.1139/v85-410.

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Apparent molar volumes of 4 cationic detergents CH3(CH2)nN(CH3)3Br (n = 9, 11, 13, and 15) have been determined in water – potassium chloride mixtures at 298 K over a wide range of concentrations (from 0.5 to 3.5 mol L−1). The small dependence of values of apparent molar volume of micellized detergent on the salt concentration suggests the interactions between amphiphiles themselves and between amphiphiles and their surroundings are not modified by the variation of KCl concentration. Previous results lead to estimates of intrinsic volumes of micellized detergents and consequently actual volumes of the micellar phase in the solution. In addition, apparent molar volumes of dodecyltrimethylammonium bromide and sodium dodecylsulfate have been determined in water – sodium chloride mixtures. The results agree fairly well with the previous conclusions and prove the dissymmetric behaviour of the anions and cations in very highly concentrated aqueous salt solutions.

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9

Bottomley, GA, and MT Bremers. "Electrolyte Molar Volumes at 273-373-K in Propylene Carbonate, N-Methylformamide, Formamide and Methanol: Their Relation to Solvent Compressibility. Ion Association Constants in Acetonitrile at 298-K." Australian Journal of Chemistry 39, no. 12 (1986): 1959. http://dx.doi.org/10.1071/ch9861959.

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Measurements have been made on several electrolytes of their apparent molar volumes at 25°C by dilatometry and typically from 0°C to 125°C by expansimetry in propylene carbonate, N- methylformamide, formamide, and methanol. The electrolyte limiting apparent molar volumes are shown to be linearly related to the temperature dependent isothermal compressibility in these solvents, as in water. Ion-pair equilibrium associated constants have been determined by volumetric means for NH4SCN, KSCN and ten other electrolytes in acetonitrile at 25°C and similarly for MgSO4 in water at 25°C. Less extensive apparent molar volume studies in water 0 to 160°C for high charge species and in liquid sulfur dioxide at 25° are also reported.

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10

Barta, Leslie, and Loren G. Hepler. "Densities and apparent molar volumes of aqueous aluminum chloride. Analysis of apparent molar volumes and heat capacities of aqueous aluminum salts in terms of the Pitzer and Helgeson theoretical models." Canadian Journal of Chemistry 64, no. 2 (1986): 353–59. http://dx.doi.org/10.1139/v86-058.

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Densities of aqueous solutions of AlCl3 (containing dilute HCl) have been measured at 10, 25, 40, and 55 °C with results that have led to defined apparent molar volumes. We have used the Pitzer ion interaction model as the basis for analyzing these apparent molar volumes to obtain standard state (infinite dilution) partial molar volumes of AlCl3(aq) at each temperature. We have also made similar use of apparent molar heat capacities of aqueous solutions of AlCl3–HCl and Al(NO3)3–HNO3 from Hovey and Tremaine to obtain standard state partial molar heat capacities of AlCl3(aq) and Al(NO3)3(aq) at these same temperatures. Finally, the standard state partial molar volumes and heat capacities have been used with the Helgeson–Kirkham semi-theoretical equation of state for aqueous ions to provide a basis for estimating the thermodynamic properties of Al3+(aq) at high temperatures and pressures.

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11

Pathak, R. N., Indu Saxena, Archna, and Anoop Kumar Mishra. "Study of the Influence of Alkyl Chain Cation-Solvent Interactions on Water Structure in 1,3-Butanediol-Water Mixture by Apparent Molar Volume Data." E-Journal of Chemistry 8, no. 3 (2011): 1323–29. http://dx.doi.org/10.1155/2011/394108.

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The densities of 1,3-butanediol-water mixtures and some tetraalkylammonium iodide salt solutions in these solvent mixtures at different concentrations (0.02 M-0.14 M) have been determined at 298.15 K using magnetic float densitometer technique. Then apparent molar volumes ΦVof the electrolytes in above solvent mixtures were calculated. The apparent molar volumes of transfer ∆ΦV° (tr) were also calculated and the ion-ion / ion- solvent interactions are then discussed on the basis of changes in the Masson's slope and apparent molar volumes of transfer data.

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12

Cui, Wanjing, Hongfang Hou, Jiaojiao Chen, Yafei Guo, Lingzong Meng, and Tianlong Deng. "Apparent molar volumes of sodium arsenate aqueous solution from 283.15 K to 363.15 K at ambient pressure: an experimental and thermodynamic modeling study." Pure and Applied Chemistry 92, no. 10 (2020): 1673–82. http://dx.doi.org/10.1515/pac-2019-1102.

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AbstractDensities of the sodium arsenate aqueous solution with the molality varied from (0.04165 to 0.37306) mol · kg−1 were determined experimentally at temperature intervals of 5 K from 283.15 K to 363.15 K and ambient pressure using a precise Anton Paar Digital vibrating-tube densimeter. The apparent molar volumes (Vϕ), thermal expansion coefficient (α) and partial molar volume $({\bar V_{\rm{B}}})$ were obtained based on the results of density measurement. The 3D diagram of apparent molar volume against temperature and molality as well as the diagram of thermal expansion coefficient and partial molar volume against molality were plotted, respectively. On the basis of the Pitzer ion-interaction equation of apparent molar volume model, the Pitzer single-salt parameters ($(\beta _{{\rm{M,X}}}^{(0)v},\beta _{{\rm{M,X}}}^{(1)v},{\rm{ }}\beta _{{\rm{M,X}}}^{(2)v}{\rm{ and }}C_{{\rm{M,X}}}^v,MX = N{a_3}As{O_4})$ and their temperature-dependent correlation F(i, p, T) = a1 + a2ln(T/298.15) + a3(T – 298.15) + a4/(620 – T) + a5/(T – 227) (where T is temperature in Kelvin, ai is the correlation coefficient) for Na3AsO4 were obtained on account of the least-squares method. Predictive apparent molar volumes agree well with the experimental values, and those results indicate that the single-salt parameters and their relational coefficients of temperature-dependence for Na3AsO4 obtained are reliable.

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13

Hou, Hongfang, Wanjing Cui, Jiaojiao Chen, Lingzong Meng, Yafei Guo, and Tianlong Deng. "Volumetric Properties in the NaAsO2 + H2O System at Temperature from 283.15 to 363.15 K and Atmospheric Pressure." Journal of Chemistry 2020 (January 11, 2020): 1–7. http://dx.doi.org/10.1155/2020/9478365.

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Densities of sodium arsenite (NaAsO2) aqueous solution with the molality varied from 0.19570 to 1.94236 mol·kg−1 at temperature intervals of 5 K from 283.15 to 363.15 K and 101 ± 5 kPa were measured by a precise Anton Paar Digital vibrating-tube densimeter. Apparent molar volumes (VΦ) and thermal expansion coefficient (α) were obtained on the basis of experimental data. The 3D diagram of apparent molar volume against temperature and molality and the diagram of thermal expansion coefficient against molality were generated. According to the Pitzer ion-interaction equation of the apparent molar volume model, the Pitzer single-salt parameters (βM,X0υ, βM,X1υ, βM,X2υ, and CM,Xυ, MX = NaAsO2) and their temperature-dependent correlation F(i, p, T) = a1 + a2ln (T/298.15) + a3(T − 298.15) + a4/(620 − T) + a5/(T − 227) (where T is temperature in Kelvin and ai are the correlation coefficients) for NaAsO2 were obtained for the first time. The predictive apparent molar volumes agree well with the experimental values, and those results indicated that the single-salt parameters and the temperature-dependent formula are reliable.

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14

Radha, Rani Gupta, and Singh Mukhtar. "Apparent molar volumes of mono- and di-saccharides in water and in aqueous oxalic acid solutions at 293.15, 303.15, 313.15 and 323.15 K." Journal of Indian Chemical Society Vol. 85, Feb 2008 (2008): 176–81. https://doi.org/10.5281/zenodo.5808797.

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Department of Chemistry, Agra College, Agra-282 002, Uttar Pradesh, India E-mail : mukhtarsingh2003@rediffmail.com Manuscript received 15 February 2007, revised 5 October 2007, accepted 6 November 2007 Apparent molar volumes (Vɸ) have been determined for mono- and di-saccharides, [D( +)-glucose, D(-)-fructose and sucrose] in water and in aqueous oxalic acid solutions at different concentrations in the range 0.2-1.0 mol kg-1 by measuring the densities at (293.15, 303.15, 313.15 and 323.15) K. The limiting apparent molar volumes (V0ɸ) and experimental slope (Sv) have been obtained in each case and their significance has been discussed briefly. The partial molar volumes (V02) have been used to calculate the partial molar volumes of transfer (ΔV0ɸ) of mono- and di-saccharides from water to aqueous oxalic acid solutions at different temperatures. The values of limiting apparent molar expansibilities (ɸ0E) and that of (∂2V0ɸ/∂T2)p have been determined from temperature-dependence of V0ɸ. It is concluded that all the saccharides behave as structure makers in water as well as in aqueous solutions of oxalic acid.

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15

Kundu, Agnita, and Nand Kishore. "Apparent Molar Heat Capacities and Apparent Molar Volumes of Aqueous 1,1,1,3,3,3-Hexafluoroisopropanol at Different Temperatures." Journal of Solution Chemistry 33, no. 9 (2004): 1085–95. http://dx.doi.org/10.1023/b:josl.0000048058.32021.98.

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16

Radha, Rani Gupta, and Singh Mukhtar. "Densities and apparent molar volumes of oxalic acid in water and in aqueous solutions of sucrose at 293.15, 303.15, 313.15 and 323.15 K." Journal of Indian Chemical Society Vol. 84, Feb 2007 (2007): 184–87. https://doi.org/10.5281/zenodo.5814678.

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Department of Chemistry, Agra College, Agra-282 002, Uttar Pradesh, India E-mail : mukhtarsingh2003@rediffmail. com Manuscript received 18 May 2006, revised 28 November 2006, accepted 29 November 2006  Apparent molar volumes (Vф) of oxalic acid in water and in aqueous sucrose solutions with concentrations =(0.5-2.0) mol kg-1 have been determined as a function of molality by measuring the densities at 293.15, 303.15, 313.15 and 323.15 K. From these data the limiting apparent molar volume (voф), which is equal to the partial molar volume at infinite dilution (vo2), has been obtained at different temperatures. The partial molar volumes have been used to calculate the partial molar volumes of transfer (Δvoф)of oxalic acid from water to aqueous sucrose solutions. The values of limiting apparent molar expansibilities, (фoE) and that of (∂2voф/∂T2)p have also been determined from temperature-dependence of voф at various concentrations of the sucrose solutions. The results have been discussed in terms of various interactions operating in oxalic acid, water and sucrose systems.

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17

Ghazoyan, Heghine H., and Shiraz A. Markaryan. "VOLUMETRIC PROPERTIES OF SOLUTIONS OF DIMETHYLSULFONE IN ETHANOL-WATER MIXTURE AT TEMPERATURES RANGE OF 298.15-323.15 K." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 7 (2017): 27. http://dx.doi.org/10.6060/tcct.2017607.5564.

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This paper studies volumetric properties of ternary dimethylsulfone-ethanol-water systems. The biomedical and environmental significance for the fundamental investigations of aqueous solution of dimethylsulfone and influences of third component on volumetric behavior of this system arises from several reasons. In the global sulfur cycle dimethylsulfide is converted to dimethylsulfone leading to an annual atmospheric production of some million tones of dimethylsulfone, much of which would be deposited in rain and snow. In addition, dimethylsulfone has been extensively studied from a medical point of view. It was established that dimethylsulfone is contained in small amounts in human blood and urine. Also of interest is that methionine is transformed into dimethylsulfone in living organisms. In this work densities of solution of dimethylsulfone in ethanol-water mixtures with various compositions have been measured over available concentration range. As it is evident from experimental data, the increase in a temperature leads to the reduction of density. The apparent and partial molar volumes of solutions were determined over the 298.15–323.15K temperature range. As it follows from these data, the apparent molar volumes increase with increasing of temperature. The influence of ethanol on the volumetric behavior has been taken into account by changing the apparent molar volume compared with the apparent molar volume of the binary aqueous solutions of DMSO2. It is found also the effect of the amount of ethanol on the volumetric properties of these solutions. It is interesting that the effect of ethanol on the values of apparent molar volumes does not change monotone with increasing in quantity of ethanol in ethanol-water mixture. In dimethylsulfone+(ethanol-water) solutions the partial molar volume of dimethylsulfone increases when quantity of ethanol in ethanol-water mixture more than 0.5 molar fraction. The observed phenomena are explained by the presence of competition of intermolecular interactions. In the DMSO2-ethanol-water system the strongest interaction between ethanol and water molecules leads to the increase in partial molar volumes for DMSO2.For citation:Ghazoyan H.H., Markaryan S.A. Volumetric properties of solutions of dimethylsulfone in ethanol-water mixture at tempe-ratures range of 298.15-323.15 K. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 7. P. 27-33.

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Radha, Rani Gupta, and Singh Mukhtar. "Apparent molar volumes of tartaric acid in water and in aqueous solutions of mono- and disaccharides at 293.15, 303.15, 313.15 and 323.15 K." Journal of Indian Chemical Society Vol. 86, Dec 2009 (2009): 1295–302. https://doi.org/10.5281/zenodo.5823860.

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Department of Chemistry. Agra College, Agra-282 002, Uttar Pradesh, India E-mail : mukhtarsingh2003@rediffmail.com Manuscript received 5 March 2009, revised 20 July 2009, accepted 21 July 2009 Apparent molar volumes (VΦ) have been determined for tartaric acid in water and in aqueous solutions of mono- and disaccharides at different concentrations by measuring the densities at 293.15, 303.15, 313.15 and 323.15 K. The limiting apparent molar volume,VΦ0, (which is equal to the partial molar volume, V20 at infinite dilution) and experimental slope (Sv) have been obtained in each case. The partial molar volumes (V20) have been used to calculate the partial molar volumes of transfer (∆VΦ0) of tartaric acid from water to aqueous solutions of mono- and disaccharides at different temperatures. The values of limiting apparent molar expansibilities (ΦE0) and that of (∂2VΦ0/∂T2)p have been determined from temperature-dependence of VΦ0. The values of pair and triplet coefficients have been determined from ∆VΦ0 It is concluded that tartaric acid behaves as structure maker in water as well as in aqueous solutions of mono- and dlsaccharides.

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19

P., B. DAS. "Apparent Molar Volume of Uniunivalent Salts Dioxane+ Water Mixtures." Journal of Indian Chemical Society Vol. 66, June 1989 (1989): 380–82. https://doi.org/10.5281/zenodo.5959224.

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State Forensic Science Laboratory, Rasulgarh, Bhubaneswar-731 010 Manuscript received 19 October 1987, revised 5 October 1988, accepted 255 April 1989 Apparent molar volumes of unlunlvalent (Ten) salts have been atudied In dioxane+ water mixtures at 10,20 and 30% (by wt.) within the temperature range 30-45o and ion-solvent Interaction has been inferred.

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20

Collins, Christopher, Joelle Tobin, Dmitri Shvedov, Rom Palepu, and Peter R. Tremaine. "Thermodynamic properties of aqueous diethanolamine (DEA), N,N-dimethylethanolamine (DMEA), and their chloride salts: apparent molar heat capacities and volumes at temperatures from 283.15 to 328.15 K." Canadian Journal of Chemistry 78, no. 1 (2000): 151–65. http://dx.doi.org/10.1139/v99-232.

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Apparent molar heat capacities Cp,ϕ and apparent molar volumes Vϕ for aqueous diethanolamine (HOC2H4)2NH, diethanolammonium chloride (HOC2H4)2NH2Cl, N,N'-dimethylethanolamine (HOC2H4)(CH3)2N, and N,N'-dimethylethanolammonium chloride (HOC2H4)(CH3)2NHCl were determined from 283.15 to 328.15 K with a Picker flow microcalorimeter and vibrating tube densimeter. The experimental results have been analyzed in terms of Young's Rule with the Guggenheim form of the extended Debye-Hückel equation and appropriate corrections for chemical relaxation effects. These calculations lead to standard partial molar heat capacities and volumes for the neutral amines, (HOC2H4)2NH(aq) and (HOC2H4)(CH3)2N(aq), and the ions (HOC2H4)2NH2+(aq) and (HOC2H4)(CH3)2NH+(aq) over the experimental temperature range. Key words: standard partial molar volumes, standard partial molar heat capacities, diethanolamine, dimethyethanolamine, aqueous alkanolamine ionization.

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Woolston, Genna E., Liliana N. Trevani, and Peter R. Tremaine. "Apparent Molar Volumes and Standard Partial Molar Volumes of Aqueous Sodium Phosphate Salts at Elevated Temperatures." Journal of Chemical & Engineering Data 53, no. 8 (2008): 1728–37. http://dx.doi.org/10.1021/je700764h.

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Woolston, Genna E., Liliana N. Trevani, and Peter R. Tremaine. "Apparent Molar Volumes and Standard Partial Molar Volumes of Aqueous Sodium Phosphate Salts at Elevated Temperatures." Journal of Chemical & Engineering Data 54, no. 3 (2009): 1172. http://dx.doi.org/10.1021/je9000137.

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23

Lal, Bhajan. "Hydration Behavior Study of Imidazolium Based ILs in Water." Applied Mechanics and Materials 625 (September 2014): 553–56. http://dx.doi.org/10.4028/www.scientific.net/amm.625.553.

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These ILs were chosen to provide an understanding of the influence of the cation alkyl chain length, and the anion influence on the volumetric properties. Densities for aqueous solutions of ionic liquids having 1-butyl-3-methylimidazolium as cation and chloride, bromide, iodide and acetate as anions were accurately measured at various concentrations and temperature, (288.15, 293.15, 298.15, 303.15 and 308.15) K. The results have been discussed in terms of hydrophobic hydration, hydrophobic interactions, and water structural changes in aqueous medium. The data were used in evaluating thermodynamic properties as apparent molar volumes, and apparent molar expansions. Apparent molar volumes were found to increase with temperature.

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Anderko, Andrzej, John P. Chan, and Kenneth S. Pitzer. "On the apparent molar volumes of nonelectrolytes in water." Journal of Solution Chemistry 22, no. 4 (1993): 369–82. http://dx.doi.org/10.1007/bf00647209.

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Amalendu, Pal, and Kumar Suresh. "Apparent molar volumes and adiabatic compressibilities of L-glycine in aqueous solutions of (CH3)4NI, NaBr and NaI at 298.15 K." Journal of Indian Chemical Society Vol. 81, Dec 2004 (2004): 1019–24. https://doi.org/10.5281/zenodo.5833155.

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Department of Chemistry, Kurukshetra University, Kurukshctra-136 119. India E-mail : palchem@sify.com Manuscript received 27 July 2004 The densities and sound speeds of L-glycine in aqueous (CH3)4Nl, NaBr and NaI are reported at 298.15 K. These data are used to derive apparent molar volumes $V_\phi$, and compressibilities $K_{\phi,S}$· Partial molar volumes $V^0_\phi$ and partial molar adiabatic compressibilities $K^0_{\phi,S}$ of L-glycine at infinite dilution were evaluated. These v:Jlucs are required for calculating hydration number nH of L-glycine. Transfer volumes $ΔV_\phi^0$ and transfer adiabatic compressibilities $ΔK^0_{\phi,S}$ at infinite dilution from water to aqueous electrolyte solutions have been calculated. Transfer parameters have been interpreted in terms of solutecosolute interactions on the basis of a cosphere overlap model.

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Wang, Jianji, Yang Zhao, Kelei Zhuo, and Ruisen Lin. "A partial-molar volume study of electrolytes in propylene carbonate-based lithium battery electrolyte solutions at 298.15 K." Canadian Journal of Chemistry 80, no. 7 (2002): 753–60. http://dx.doi.org/10.1139/v02-092.

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Apparent molar volumes (V2, ϕ ) and standard partial-molar volumes (V20, ϕ ) of LiClO4 and LiBr at 298.15 K have been determined from precise density measurements in solvent mixtures of propylene carbonate (PC) with dimethylformamide (DMF), tetrahydrofuran (THF), acetonitrile (AN), and methyl formate (MF). The scaled particle theory is used to calculate the contributions of the cavity formation and the electrolyte-solvent interactions to the standard partial-molar volumes. It is shown that V20, ϕ is strongly dependent on the nature of the solvents, and the trends in V20, ϕ with composition of the solvent mixtures are determined by the interaction volumes of electrolytes with solvents. The results are discussed in terms of ionic preferential solvation, packing effect of solvents in the solvation shell, and electrostriction of solvents by ion.Key words: partial-molar volume, scaled particle theory, lithium salts, propylene carbonate, solvent mixtures, lithium battery electrolytes.

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Sharma, Ravinder, and Harsh Kumar. "Volumetric and Acoustic Studies of Interactions between L-Phenylalanine and 1-Hexyl-3-Methylimidazolium Bromide in Aqueous Solution." ECS Transactions 107, no. 1 (2022): 5227–33. http://dx.doi.org/10.1149/10701.5227ecst.

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Experimental density (ρ) and ultrasonic velocity (c) for phenylglycine in ( 0.01, 0.03, 0.05 and 0.05) mol.kg−1 aqueous solutions of 1-hexyl-3-methylimidazolium bromide at T = (313.15 and 318.15) K. Collected values for density and ultrasonic velocity were used to compute the apparent molar volumes (V f ), the apparent molar volumes at infinite dilution (), partial molar isentropic compression (K f ,s ) and partial molar isentropic compression at infinite dilution (). Also recorded data of these mixtures were utilized to calculate pair and triplet interaction coefficients. Such thermodynamic characteristics can be used to investigate the solvation behaviour, structure formation, and many sorts of interactions in (phenylglycine + water + 1-hexyl-3-methylimidazolium bromide) ternary solutions.

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Mahendra, B. Dhande, and T. Tayade D. "Volumetric Properties of Aqueous Sodium Salt of Amino Acids as CO2 Capture Solvent." Indian Journal of Science and Technology 15, no. 47 (2022): 2673–79. https://doi.org/10.17485/IJST/v15i47.1975.

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Abstract Objectives: To produce new and accurate data of density of aqueous solution of amino acid salts at different temperatures and to correlate it with molality. Methods: The densities of aqueous solutions of sodium salts of Amino acids such as L-cysteine, L-leucine, L-proline and L-valine have been measured using double-arm Pycnometer, placed in a transparent glass-walled water bath having thermal stability of (0.01 K) at concentrations range (0.01 to 0.15) mol L-1 and at 298.15, 303.15, 308.15, and 313.15 K. From density data ahead, apparent molar volumes (Vϕ ), the partial molar volumes (Vϕ 0), expansion coefficient (E¥) and Hepler’s constant ( ¶ 2Vϕ 0=¶ T2) were calculated and analysed on the basis of the intermolecular interaction and molecular structure. Findings: The densities are observed to increase with concentration and decrease with increasing temperature. The positive values of partial molar volume (Vϕ 0) indicate strong sodium amino acids -water interactions. Novelty: For studied aqueous sodium salt solution of Amino acids, such properties have not yet been reported in the open literature and at such a lower concentrations range (0.01 to 0.15) mol L-1. Keywords: Density; Sodium Salt Amino Acid; Apparent Molar Volume; Helper’s Constant

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29

Pal, A., and Y. P. Singh. "Excess Molar Volumes and Apparent Molar Volumes of Some Amide + Water Systems at 303.15 and 308.15 K." Journal of Chemical & Engineering Data 40, no. 4 (1995): 818–22. http://dx.doi.org/10.1021/je00020a018.

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30

Hadded, M., M. Biquard, P. Letellier, and R. Schaal. "Propriétés volumiques du nitrate d'éthylammonium fondu à 298 K et de ses mélanges avec l'eau." Canadian Journal of Chemistry 63, no. 3 (1985): 565–70. http://dx.doi.org/10.1139/v85-092.

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Partial molar volumes of water and ethylammonium nitrate EAN are determined accurately in all water–EAN mixtures, between pure water and pure fused salt at 298 K. It has been found that the partial molar volume of water decreases linearly with molar fraction of salt, x, in concentrated solution of EAN (C > 2 mol L−1, x > 0.04). The main thermodynamic relations are established to describe the volumetric behaviour of salt, water, and solution. It has been shown that the intrinsic volume of salt can be identified roughly with the molar volume of the pure fused salt and the value of apparent molar volume of water with the actual volume of water in solution.

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31

J., S. SANDHU, and SINGH GURBIR. "Apparent Molar Volumes of L-Proline and L-Hydroxyproline in Methanol-Water Mixtures." Journal of Indian Chemical Society Vol. 65, Aug 1988 (1988): 602–4. https://doi.org/10.5281/zenodo.6348786.

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Department of Chemistry, Punjabi University. Patiala-147 002   Manuscript received 12 April 1988, accepted 3 June 1988 Apparent Molar Volumes of L-Proline and L-Hydroxyproline in Methanol-Water Mixtures.

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32

Radha, Rani Gupta, and Singh Mukhtar. "Apparent molar volumes of malonic and succinic acids in water and in aqueous solutions of mono- and disaccharides at 293.15, 303.15, 313.15 and 323.15 K." Journal Of Indian Chemical Society Vol. 87, Sep 2010 (2010): 1075–85. https://doi.org/10.5281/zenodo.5802626.

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Department of Chemistry, Agra College, Agra-282 002, Uttar Pradesh, India E-mail : mukhtarsingh2003@rediffmail.com Manuscript received B October 2009, revised 8 March 2010, accepted 16 March 2010 Apparent molar volumes of malonic and succinic acids have been determined In water and in aqueous solutions of mono- and disaccharides at different temperatures (193.15, 303.15, 313.15 and 313.15 K). The limiting apparent molar volumes (VΦ0) and experimental slope (Sy) have been obtained in each case. The partial molar volumes (V20) have been used to calculate the partial molar volumes of transfer (ΔVΦ0) of malonic and succinic acids from water to aqueous solutions of mono- and disaccharides at different temperatures. The values of limiting apparent molar expansibilities (ΦE0) and that of (∂2VΦ0/∂T2)p have been determined from the temperature-dependence of VΦ0. The values of pair (VAB) and triplet (VABB) coefficients have been determined from ΔVΦ0. It is concluded that both the acids behave as structure makers in water as well as in aqueous solutions of mono- and disaccharides.

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33

Zhao, Yang, Jianji Wang, Xiaopeng Xuan, and Ruisen Lin. "Volumetric studies of ion solvation in propylene carbonate + N,N-dimethylformamide electrolyte solutions." Canadian Journal of Chemistry 81, no. 4 (2003): 307–14. http://dx.doi.org/10.1139/v03-061.

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Apparent molar volumes V2,ϕ and standard partial molar volumes V°2,ϕ for tetraethylammonium bromide (Et4NBr), tetrapropylammonium bromide (Pr4NBr), tetrabutylammonium bromide (Bu4NBr), and tetrahexylammonium bromide (Hex4NBr) have been determined at 298.15 K from precise density measurements in solvent mixtures of propylene carbonate (PC) with N,N-dimethylformamide (DMF). Combined with our previous data for LiClO4 and LiBr in the same solvents, ionic molar volumes of Li+, Et4N+, Pr4N+, Bu4N+, Hex4N+, and related anions have been deduced from the extrapolation method suggested by Conway and co-workers. It is shown that the molar volumes of these cations are quite independent of the nature of the solvent and the composition of the solvent mixtures, in contrast to those of ClO4 and Br anions. This suggests that the Lewis-base-type solvents with similar molecular volumes have similar interactions with Li+. The constancy in partial molar volume for tetraalkylammonium ions provides helpful evidence for the lack of solvation of large tetraalkylammonium cations in organic solvents. These findings have been interpreted using scaled-particle theory. The results are discussed in terms of ion solvation, packing effects of solvent molecules in the solvation shell, and the electrostriction of solvents.Key words: ionic volumes, propylene carbonate, N,N-dimethylformamide, solvent mixtures, solvation, lithium batteries.

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34

Mallik, Tapas, Srabanti Ghosh, and Deepak Ekka. "Comparison of different types of molar volume equations for the validity and applicability in a ternary (carbamazepine+alizarin+methanol) solution system and study of the corresponding molecular interactions." Journal of the Serbian Chemical Society, no. 00 (2022): 62. http://dx.doi.org/10.2298/jsc220429062m.

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In this work, the molecular interaction between the carbamazepine and alizarin in methanol has been represented in terms of limiting apparent molar volumes and viscosity coefficients. Before further proceeding, the validity and applicability of the calculation of apparent molar volumes have also been checked by considering the available five types of frequently used equations, where the required modifications have proposed by the addition of hypothetical mass and concentration of the solute. After that, the limiting apparent molar volume and viscosity coefficients have been calculated using Masson equation and Jones-Dole equation respectively to predict and cross-checked the interactions occurring between the molecules in ternary system. The eq 1 has been found the best-fit equation, and the carbamazepine and alizarin in methanol are strongly bound (?Vo = 23104 m3 mol-1 and B = 18.10 kg mol-1) to each other at the concentration 0.003 mol kg-1. The results have been interpreted in favour of the solute-cosolute interactions, which is dominant over the solute-solute and cosolute-cosolute interactions. The interpretations have been discussed with the help of intermolecular forces and non-covalent interactions.

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35

Čeleda, Jiří. "On theory of apparent molar volumes in concentrated aqueous solutions of strong electrolytes." Collection of Czechoslovak Chemical Communications 53, no. 3 (1988): 446–58. http://dx.doi.org/10.1135/cccc19880446.

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On the basis of the method reported in the previous work, according to which close-packed hydration sheaths of ions are surrounded by excess voids which in the above model were replaced by contact gap of width d0 independent of temperature and concentration, it is inferred in the present study that on extrapolating the apparent volumes of strong electrolytes to zero volume fraction of water in solution, temperature-independent water-free ion volumes Φ’i are obtained. These volumes correspond to the state in which the contact gap is shifted up to the very surface of ions, without changing its width d0 = 39 ± 2 pm. The volumes Φ’i show additivity and acquire thus the properties of parameters which are applicable to calculation of the density of aqueous solutions of strong electrolytes as well as of their mixtures up to the highest possible concentrations. With Li+ and Na+ ions, the condition of temperature invariance of Φ’i results in that the hydrate nucleus is not naked cation but a species MH2O+ analogous to H3O+ ion. This explains likely the different function of Na+ and K+ ions in biological systems (especially concerning their permeation through membranes). In the case of Mg2+, Ca2+, Sr2+, and Ba2+ ions, the hard-body centre of their hydrates is formed by hexaaqua-complexes.

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36

Ren, Xiaoling, Ruisen Lin, Yaming Ni, and Hanxing Zong. "Apparent molar volumes of glycine, L-alanine, and L-serine in water + ethanol mixtures at 298.15 K." Canadian Journal of Chemistry 77, no. 3 (1999): 387–90. http://dx.doi.org/10.1139/v99-017.

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Densities of glycine, L-alanine, and L-serine have been measured with an oscillating-tube densimeter at 298.15 K in water + ethanol (EtOH) mixtures ranging from pure water to 45% ethanol by mass. From these densities, apparent molar volumes and limiting apparent molar volumes of the three amino acids in the mixtures have been calculated. Transfer volumes are interpreted in terms of the structure-making or structure-breaking effects of water on addition of these amino acids in the mixtures. The relative contributions of hydrophilic and hydrophobic interactions in these solutions have been inferred.Key words: glycine, L-alanine, L-serine, water + ethanol mixtures, densities.

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37

Rao, N. P., and Ronald E. Verrall. "Ultrasonic velocity, excess adiabatic compressibility, apparent molar volume, and apparent molar compressibility properties of binary liquid mixtures containing 2-butoxyethanol." Canadian Journal of Chemistry 65, no. 4 (1987): 810–16. http://dx.doi.org/10.1139/v87-137.

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Ultrasonic velocity and density data of binary systems of water–2-butoxyethanol (BE), 2-butoxyethanol-benzene, and 2-butoxyethanol–decane are reported for temperatures of 25, 40, and 55 °C. Adiabatic compressibility coefficients, apparent molar volumes, and apparent molar compressibilities were calculated from these data. Excess adiabatic compressibility properties were evaluated using volume fraction weighting of the individual component properties to estimate ideal mixture behavior. These results are compared with the data obtained based on the use of mole fraction weighting of the individual component properties for the ideal behavior value. A sharp ultrasonic velocity maximum and compressibility minimum is observed at low BE concentration in mixtures of water–BE at all temperatures. These maxima in ultrasonic velocity and minima in adiabatic compressibility are attributed to the formation of "clathrate-like" structures of water and alcohol. A shift of the velocity maximum towards lower concentrations of BE was observed with increase of temperature. A minimum in the ultrasonic velocity and a maximum in adiabatic compressibility coefficient values are observed in systems of BE–benzene and BE–decane. These results are discussed in terms of the breakdown of associated alcohol structures and the interstitial location of hydrocarbon molecules in alcohol aggregates.

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38

Hakin, Andrew W., Susan A. M. Mudrack, and Colin L. Beswick. "The volumetric and thermochemical properties of L-ascorbic acid in water at 288.15, 298.15, and 308.15 K." Canadian Journal of Chemistry 71, no. 7 (1993): 925–29. http://dx.doi.org/10.1139/v93-123.

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Measurements have been made at 288.15, 298.15, and 308.15 K with a flow microcalorimeter and densimeter to obtain heat capacities and densities for L-ascorbic acid and sodium chloride in water. These data are reported in terms of apparent molar volumes [Formula: see text] and apparent molar heat capacities [Formula: see text] The volume of ionization (ΔV0) and heat capacity of ionization (ΔCP0) for the acid at 298.15 K have been calculated using a method that does not require volumetric and thermochemical data for the sodium salts of the acid. Details of our methodology are presented.

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39

Ghazoyan, Heghine H. "VOLUMETRIC PROPERTIES OF ACRYLONITRILE+ETHANOL MIXTURE OVER TEMPERATURE RANGE FROM (293.15 TO 323.15) K AT AMBIENT PRESSURE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 2 (2020): 32–37. http://dx.doi.org/10.6060/ivkkt.20206302.6068.

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Densities of binary mixture of acrylonitrile in ethanol have been measured over the full range of compositions at temperatures from 293.15K to 323.15 K at the ambient pressure (87.9 kPa). The volumetric properties such as excess molar volumes, apparent molar volumes, partial molar volumes, excess partial molar volumes, standard partial molar volumes for binary mixture were calculated. Excess molar volumes were described by the Redlich–Kister polynomial equation. The Redlich–Kister coefficients and the standard deviations were calculated as well. The excess molar volumes exhibit mainly negative deviations from the ideal behavior over the whole range of composition for acrylonitrile+ethanol binary mixtures at low temperatures and become less negative with increasing temperature from 293.15 to 323.15 K. The results are interpreted on the basis of strong interaction between group of acrylonitrile and OH group of ethanol by hydrogen bonding. However, the sigmoid shape of plots of excess molar volumes versus molar fraction of ethanol from positive to negative values indicates to the varying interactions depending upon the composition of binary mixtures. Moreover, it is also attributed to the self-associating effect of ethanol therefore the self-associates of acrylonitrile by dipole-dipole interactions and the self-associates of ethanol by hydrogen bonding between same molecules at low concentrations predominate too.

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40

M., L. Parmar, and Sharma Sanjiv. "Partial molar volumes and their temperature derivatives for potassium nitrate, magnesium nitrate and calcium nitrate in binary aqueous solutions of urea." Journal of Indian Chemical Society Vol. 76, Apr 1999 (1999): 202–4. https://doi.org/10.5281/zenodo.5848222.

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Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla-171 005, India Manuscript received 4 November 1997, revised 9 December 1998, accepted 23 December 1998 The partial molar volumes of potassium nitrate, magnesium nitrate and calcium nitrate have been determined in binary aqueous solutions of urea at different mole fractions of urea and at different temperatures from the density measurements. The density data have been analysed using Masson's equation. The limiting apparent molar volumes ($\Phi_V^0$) and the experimental slopes (Sv) have been interpreted in terms of ion-solvent and ion-ion interactions respectively. The $\Phi_V^0$ values vary with temperature as a power series of temperature. The structure-making/breaking capacities of the electrolytes have been inferred from the sign of [ $\partial$2 $\Phi_V^0$/$\partial$T2)p· All the electrolytes studied behave as structure-makers/promotors in the present system.

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41

Kishore, N., R. N. Goldberg, and Y. B. Tewari. "Apparent molar heat capacities and apparent molar volumes of aqueous glucose at temperatures from 298.15 K to 327.01 K." Journal of Chemical Thermodynamics 25, no. 7 (1993): 847–59. http://dx.doi.org/10.1006/jcht.1993.1082.

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42

DELGADO, Daniel Ricardo, Edgar Francisco VARGAS та Fleming MARTÍNEZ. "APPARENT MOLAR VOLUMES OF THE ΒETA-ADRENERGIC BLOCKER PROPRANOLOL-HCl IN AQUEOUS MEDIA AT SEVERAL TEMPERATURES". Vitae 18, № 1 (2011): 72–76. http://dx.doi.org/10.17533/udea.vitae.8779.

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Propranolol-HCl is a non selective β-adrenergic blocker widely used in the treatment of several cardiovascular diseases; nevertheless, the physicochemical information about its volumetric behavior and other aqueous properties is not complete at present. In this context, densities of aqueous solutions of propanolol-HCl have been measured in this research as a function of concentration (from 0.0500 to 0.2500) mol kg–1 at several temperatures, i.e. (278.15, 283.15, 288.15, 293.15, 298.15, 303.15, 308.15 and 313.15) K. These values have not been reported earlier in the literature. The apparent molar volumes and partial molar volumes at infinite dilution for the electrolyte drug were calculated. Otherwise, the partial molar volumes at infinite dilution and the partial molar expansibilities for the drug as molecular form were also calculated. The dependence of these properties on temperature is presented. The results are interpreted in terms of several solute-solvent interactions. Ultimately, the reported information can be useful to understand the intermolecular events exhibited by this drug in pharmaceutical and biological systems.

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43

Warmińska, Dorota, and Wacław Grzybkowski. "Apparent molar volumes and compressibilities of selected electrolytes in dimethylsulfoxide." Journal of Chemical Thermodynamics 42, no. 12 (2010): 1451–57. http://dx.doi.org/10.1016/j.jct.2010.07.003.

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44

Birch, Gordon G., and Roselina Karim. "Apparent molar volumes and1H-NMR relaxation values of glucose syrups." Journal of the Science of Food and Agriculture 58, no. 4 (1992): 563–68. http://dx.doi.org/10.1002/jsfa.2740580416.

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45

Aguilar, M., H. Dominguez, and O. Pizio. "Apparent molar volume anomaly in water-dimethyl sulfoxide liquid mixtures. Molecular dynamics computer simulations." Condensed Matter Physics 25, no. 4 (2022): 44201. http://dx.doi.org/10.5488/cmp.25.44201.

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We have studied the composition dependence of density of liquid water-DMSO mixtures at different temperatures by using the isobaric-isothermal (NPT) molecular dynamics computer simulations. The non-polarizable semi-flexible, P1 and P2 models for the DMSO molecule combined with the TIP4P-2005 water model are considered. The excess mixing volume and the apparent molar volumes of the species are reported. We have established that the P1-TIP4P-2005 model for the mixture provides a very good description of the location of the minimum of apparent molar volume for DMSO species indicating the anomaly. Most important is that the temperature interval where the hydrophobic effect exists, is correctly captured with this modelling, in contrast to the P2-TIP4P-2005 model.

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46

Chen, Jie, Sheng Fang, Yu-Gang Shi, Yue-Cheng Meng, and Da-Hai Ren. "Effect of Hydroxylamine Sulfate on Volumetric Behavior of Glycine,L-Alanine, andL-Arginine in Aqueous Solution." Journal of Chemistry 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/481341.

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The apparent molar volumes of glycine,L-alanine, andL-arginine in aqueous hydroxylamine sulfate solutions have been determined atT=298.15 K and atmospheric pressure. The standard partial molar volumes,V20, corresponding partial molar volumes of transfer,ΔtrV20, and hydration numbers,NH, have been calculated for theseα-amino acids from the experimental data. TheΔtrV20values are positive for glycine,L-alanine, andL-arginine and are all increased with the increase in the concentration of hydroxylamine ions. These parameters obtained from the volumetric data are interpreted in terms of various mixing effects between amino acids and hydroxylamine sulfate in aqueous solutions.

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Ali, Anwar, Firdoos Ahmad Itoo, and Nizamul Haque Ansari. "Interaction of Some Amino Acids with Sodium Dodecyl Sulphate in Aqueous Solution at Different Temperatures." Zeitschrift für Naturforschung A 66, no. 5 (2011): 345–52. http://dx.doi.org/10.1515/zna-2011-0511.

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The density ρ, and viscosity η of 0.00, 0.05, 0.10, 0.15, and 0.20 mol kg−1 glycine (Gly), dlalanine (Ala), dl-serine (Ser), and dl-valine (Val) have been measured in 0.002 mol kg−1 aqueous sodium dodecyl sulphate (SDS) at 298.15, 303.15, 308.15, and 313.15 K. These data have been used to calculate the apparent molar volume φv, infinite dilution apparent molar volume φv°, and the standard partial molar volumes of transfer φv° (tr), of the amino acids from water to the aqueous SDS solutions. Falkenhagen coefficient A, Jones-Dole coefficient B, free energies of activation per mole of solvent (aqueous SDS) Δμ1°*, and per mole solute (amino acids) Δμ2°*, also enthalpy ΔH* and entropy ΔS* of activation of viscous flow were evaluated using viscosity data. The molar refraction RD was calculated by using experimental values of the refractive index nD of the systems. The results have been interpreted in terms of ion-ion, ion-polar and hydrophobic-hydrophobic group interactions. The volume of the transfer data suggest that ion-ion intertactions are predominant.

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Dhiman, Monika, Arun Upmanyu, Devinder Singh, and Kailash Juglan. "Ultrasonic and spectroscopic investigations of molecular interactions in binary mixture of PEG-400 and DMSO at different temperatures." Journal of the Serbian Chemical Society, no. 00 (2024): 58. http://dx.doi.org/10.2298/jsc231207058d.

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In the present study, the ultrasonic velocity and density data for the binary mixture of Polyethylene Glycol (PEG)-400 and Dimethyl Sulfoxide (DMSO), at various concentrations and different temperatures (T = 288.15 K, 298.15 K and 308.15 K), have been measured and further utilized to determine several physical parameters such as adiabatic and isothermal compressibility, intermolecular free length, internal pressure, and free volume. Excess values of these parameters have also been computed and fitted with the Redlich-Kister (R-K) polynomial equation. The nature, type, and strength of intermolecular interactions present within the PEG-400 + DMSO mixture have been explained based on the sign and magnitude of excess values. Furthermore, partial molar volumes, excess partial molar volumes, apparent molar volumes, and apparent molar volumes at infinite dilution have also been determined to investigate the solute-solvent interactions. Various mixing rules such as the ideal mixing rule (Uim), Nomoto relation (UN), impedance dependence relation (UZ), Junjie relation (UJ), Van Deal-Vangeel relation (UV) and collision factor theory (UCFT) are employed to compute the ultrasonic velocity and compared with the experimental one. Among these relations, the Nomoto and Junjie relations are found to be most suitable for the given mixture. In addition to it, the present system has also been examined using Fourier Transform Infra-Red (FTIR) and Ultraviolet-visible (UV-Vis) spectroscopic techniques. The change in intensity and shift in peak position in the FTIR and UV-vis spectra of the PEG-400 + DMSO mixture are utilized to confirm the intermolecular hydrogen bonding in the given system.

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Hakin, Andrew W., Michelle M. Duke, Sheri A. Klassen, Robert M. McKay, and Kathryn E. Preuss. "Apparent molar heat capacities and volumes of some aqueous solutions of aliphatic amino acids at 288.15, 298.15, 313.15, and 328.15 K." Canadian Journal of Chemistry 72, no. 2 (1994): 362–68. http://dx.doi.org/10.1139/v94-056.

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The thermodynamics of amino acid systems are key to the understanding of protein chemistry. We have found that many previous studies of the apparent molar volumes and heat capacities of aqueous solutions of amino acids were conducted at the standard temperature of 298.15 K. This does not allow for the fact that most biological processes occur at temperatures removed from this standard condition.In an attempt to address this imbalance we have measured densities and heat capacities for aqueous solutions of glycine, L-alanine, L-serine, and L-threonine at 288.15, 298.15, 313.15, and 328.15 K using a Picker flow microcalorimeter. Apparent molar volumes and heat capacities, and the associated standard state partial molar properties have been calculated. Constant pressure variations of revised Helgeson, Kirkham, and Flowers equations have been fitted to calculated standard state volumes and heat capacities over the temperature range 288.15 to 328.15 K. These equations may be used to estimate standard state volumes and heat capacities, and hence equilibrium constants, for aqueous amino acid systems at higher temperatures.

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BIJAN, DAS, and K. HAZRA DILIP. "A Study on the Solute-Solute and Solute-Solvent Interactions of some Tetraalkyl-ammonium Perchlorates in Aqueous Binary Mixtures of 2-Methoxyethanol from their Partial Molar Volume Data." Journal of Indian Chemical Society Vol. 74, Feb 1997 (1997): 108–9. https://doi.org/10.5281/zenodo.5875163.

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Department of Chemistry, North Bengal University, Darjeeling-734 430 Manuscript received 15 February 1995. accepted 25 July 1995 The apparent molar volumes of four symmetrical tetraalkylammonium perchlorates (Me4NClO4, Et4NCIO4, Pr4NClO4 and Bu4NCIO4) have been determined in 2-methoxyethanol (ME)+ water mixtures containing 20, 40,60 and 80 mass% of 2-methoxyethanol at 25º. The apparent molar volumes are extrapolated to zero concentration to obtain the limiting values at infinite dilution. Ionic limiting partial molar volumes have been estimated using the extrapolation method. Ion-ion interactions are found to be very weak but increase with Increasing amount of 2-methoxyethanol in the solvent mixtures. The results have been explained on the basis of the electrostriction effect of the perchlorate ion and the hydrophobic and size effects of the tetraalkylammonium ions.

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Journal articles on the topic 'Apparent molar volumes'

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