Volumetric, acoustic and viscometric studies of solute-solute and solute-solvent interactions of glycyl-glycyl-glycine in aqueous tartaric acid at different temperatures

摘要

In this investigation, thermophysical properties like density, speed of sound and viscosity of solutions of glycylglycyl-glycine (0.05-0.40) mol. kg(-1) were studied with water and aqueous solvent (tartaric acid). The solutions were experimentally calculated with in temperature range of (298.15 and 318.15) K and at pressure (0.1 MPa). The obtained experimental outcomes were further taken to compute the parameters like apparent molar volume, limiting apparent molar volumes, limiting apparent molar volumes of transfer, the hydration number from volumetric data and properties like apparent molar isentropic compression, limiting apparent molar isentropic compression, limiting apparent molar isentropic compression of transfer and the hydration number from acoustic data of the studied solutions. The experimental viscosity values were used in the Jones-Dole equation to obtain viscosity coefficients A and B. The computed activation parameters of the studied system were explained on the lines of transition state theory. These experimental and computed parameters and further, their alterations with molal concentration and temperature were discussed from the point of view of ionic-hydrophilic, hydrophilic-hydrophilic and hydrophilic-hydrophobic operational in the system. (C) 2020 Elsevier B.V. All rights reserved.