Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

The densities and viscosities of the ternary mixtures of glycine, L-alanine, L-valine, L-threonine and Larginine in aqueous maltitol solutions were measured at T = (293.15 323.15) K under the atmospheric pressure. The apparent molar volume (Vu), the limiting partial molar volume (Vu 0 ) and the limiting partial molar volume of transfer (DtrVu 0 ) were obtained in terms of the measured density, then the viscosity Bcoefficient was further calculated by the least-square method. Meanwhile, the partial molar isobaric expansion (E2 0 ), the isobaric thermal expansion coefficient (a2), the solvation number (nS), the free energies of activation per mole of solvent (Dl1 0 ) and per mole of solute (Dl2 0 ) were also calculated. The volumetric and viscometric properties were analyzed and discussed according to the interactions between amino acids and maltitol molecules based on the co-sphere overlap model and the transition state theory.