Partial molar volume and partial molar isentropic compressibility study of glycine betaine in aqueous and aqueous KCl or MgCl2 solutions at temperatures T = 288.15-318.15 K

Partial molar volume, Ф v0, isentropic compressibility, Kappa s, and partial molar isentropic compressibility, Phi k0 of glycine betaine in aqueous and aqueous KCl or MgCl2 solutions have been computed using the experimental density and speed of sound data at temperatures, T = 288.15-318.15 K. The t...

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Bibliographic Details
Published in:Thermochimica acta 2013, Vol.572, p.23-29
Main Authors: Karanth, V R, Bhat, Denthaje
Format: Article
Language:English
Subjects:
Betaines
Compressibility
Computation
Density
Glycine
Mathematical analysis
Mathematical models
Molar volume
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Summary:Partial molar volume, Ф v0, isentropic compressibility, Kappa s, and partial molar isentropic compressibility, Phi k0 of glycine betaine in aqueous and aqueous KCl or MgCl2 solutions have been computed using the experimental density and speed of sound data at temperatures, T = 288.15-318.15 K. The transfer partial molar volumes, Delta trФ v0, and transfer partial molar isentropic compressibilities, Delta tr Phi k0, have also been evaluated using the experimental data. The partial molar volumes of glycine betaine were computed using the usual equation as well as the equation employed by Pitkaenen et al. So obtained values have been compared with literature values. The variations in experimental and computed parameters have been discussed in terms of solute-solvent and solute-solute interactions.
ISSN:0040-6031
DOI:10.1016/j.tca.2013.08.002