Prediction of the enthalpy of transfer of alkali-metal halides in binary mixtures

Abstract

The quasi-lattice quasi-chemical model has been modified in order to predict the enthalpy of transfer of alkali-metal halides in binary solvent mixtures from the solvation properties in the pure solvents and from the excess enthalpy and Gibbs energy of mixing of the solvents. In mixtures with a negative Gibbs energy of mixing, there is an approximately linear dependence of the enthalpy of transfer on the mole fraction. In mixtures with a positive Gibbs energy of mixing, the occurrence of an extremum in the enthalpy of transfer is predicted.