Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

This paper presents data for density oqP and relative viscosity ogrP measurements of aqueous solutions of thiamine hydrochloride, pyridoxine hydrochloride and sodium-L-ascorbate in dilute solutions (0 0.1) mol kg 1 at three different temperatures, T = (275.15, 277.15 and 279.15) K and at 101.3 kPa. Density results have been used to calculate apparent molar volume of solute, limiting apparent molar volume of solute, limiting apparent molar expansivity of solute, (d2V0)/dT2) and coefficient of thermal expansion. Calculated viscosity values have been correlated according to Jones-Dole equation to obtain Falkenhagen coefficient A, Jones-Dole viscosity B-coefficient, temperature derivative of B-coefficient i.e. (dB/dT) and hydration number. Free energy of activation for viscous flow per mole of solvent, per mole of solute; entropy of activation per mole of viscous flow of solution and enthalpy of activation have also been computed through B-coefficient. These significant parameters have been discussed in terms of different molecular interactions.