مشخصات پژوهش

Molar conductances for sodium chloride have been measured in the solvent system mannitol- water covering the solvent composition range from pure water to saturated aqueous mannitol at temperature from 293.15 to 313.15 K at 5 K intervals. According to the Fuoss–Justice conductance equation, limiting molar conductance Λ∞ , association constants KA , and the Walden products were obtained and their variations were in conformity with the thermodynamics study of solvent effect. The Eyring’s activation enthalpy of charge transport ΔH† was derived and the results have stipulated that this kinetic procedure depends only on the solvent properties. Ion association thermodynamic quantities, Gibbs energy ( ΔG◦ ), enthalpy ( ΔH◦ ), and entropy ( ΔS◦ ) were also calculated and their interpretation were further supported by other methods. Besides, by appropriate splitting of Gibbs’ energy of association into electrostatic and non-electrostatic contributions.