Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Densities ( I) and viscosities ( A) of aqueous xylitol solutions with glycine, L-alanine, L-valine, L-threonine or L-arginine were measured at T = (293.15 to 323.15) K under atmospheric pressure. The density values were utilized to further calculate the apparent molar volume (V O), the limiting partial molar volumes of amino acids (V O 0), the limiting partial molar volumes of transfer ( trV O 0) and the interaction coefficients Vab, Vabb, Vabbb. The viscosity data were used to obtain viscosity B-coefficient, the free energies of activation per mole of solvent ( E1 0 ) and solute ( E2 0 ). The limiting partial molar volumes of transfer and the free energies of activation per mole of both solvent ( E1 0 ) and solute ( E2 0 ) were analyzed based on the cosphere overlap model and transition state theory, respectively. The hydration number of amino acid was determined using the obtained limiting partial molar volume and viscosity B-coefficient.