Limiting apparent molar volumes, limiting apparent molar isentropic compressions, transfer parameters and transition state theory for ternary mixtures of Gly-Gly-Gly in aqueous solutions of ascorbic acid at temperatures between (298.15 and 318.15) K

Abstract

Density, speed of sound, viscosity parameters were measured for glyclyl-glycyl-glycine in aqueous molal solutions of ascorbic acid were reported at condition of pressure (=0.1 MPa) and temperature (ranging 298.15–318.15) K. The results of thermophysical properties were obtained in the molality range (0.0499 to 0.3998) mol·kg−1 for glycyl-glycyl-glycine and of (0.1942, 0.3773, 0.5504, 0.7142) mol·kg−1 for ascorbic acid. The various thermophysical parameters like apparent molar volume, apparent molar isentropic compression, limiting apparent molar volumes, limiting apparent molar isentropic compression, empirical-interaction coefficients, transfer parameters (from volumetric and acoustic data), Falkenhagen coefficient, Jones-Dole coefficient, and dB/dT (first derivative of B-coefficient were computed with the help of experimental values. Also, the Gibbs free energy of activation of solvent and solute were calculated and explained with the help of transition state theory. The studied thermophysical parameters at different temperatures and molal concentrations were explained from the point of view of solute–solute and solute–solvent interactions and their structural effects.