Volumetric and Viscometric Studies of Amino Acids in Mannitol Aqueous Solutions at T = (293.15 to 323.15) K

Densities and viscosities of glycine, l -alanine, l -valine, l -threonine, and l -arginine in aqueous solutions of (0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) mol·kg –1 mannitol have been measured in the temperature range of (293.15 to 323.15) K under atmospheric pressure; then the measured densities and viscosities of experimental systems were correlated. These data were further used to calculate the apparent molar volumes ( V φ ), the limiting partial molar volumes ( V φ 0 ), the limiting partial molar volumes of transfer (Δ tr V φ 0 ), the viscosity B -coefficients, and the free energies of activation per mole of solvent (Δμ 1 0≠ ) and solute (Δμ 2 0≠ ). The results were interpreted through solute–solute interaction and solute–solvent interaction on the basis of the cosphere overlap model and transition state theory.