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Title: Thermophysical studies of protonated and deprotonated glycine in aqueous sodium acetate buffer solutions at different temperatures
Authors: Patyar, Poonam
Kaur, Gurpreet
Keywords: Acetate buffer;pH;Glycine;Density;Viscosity
Issue Date: Oct-2021
Publisher: NIScPR-CSIR, India
Abstract: Interactions of glycine in water and in (0.10, 0.50 and 1.00) mol kgāˆ’1 aqueous sodium acetate buffer solutions of pH(1.00 and 12.40) have been investigated at different temperatures, T(K) = (298.15-318.15). Densities, šœŒ and viscosities, šœ‚ of glycine in water and in aqueous sodium acetate buffer solutions have been measured. The obtained density data have been used to calculate apparent molar volume, šœ™š‘£, limiting partial molar volume, šœ™š‘£š‘œ, limiting partial molar volumes of transfer,Ī”š‘”š‘Ÿšœ™š‘£. Viscosity B-coefficient, viscosity B-coefficient of transfer, Ī”š‘”š‘Ÿšµ, activation free energies per mole of the solute,Ī”šœ‡2š‘œ# and solvent, Ī”šœ‡1š‘œ# have been calculated from viscosity data. Further, second order derivative of partial molarexpansion coefficient and dependence of š‘‘šµš‘‘š‘‡ coefficients on temperature is useful in measuring the structure making and breaking behaviour of solute in these systems. Pair and triplet interaction coefficients for both the properties were also calculated. Thus, the results obtained from volumetric and viscometric studies are of considerable importance to identify different type of interactions (i.e. H-bonding, van der Waals interactions) in these systems.
Page(s): 1317-1328
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJC-A Vol.60A(10) [October 2021]

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