Collect. Czech. Chem. Commun. 1989, 54, 1464-1474

Extension of a lattice model of electrolytes to a ternary system of a salt and two solvents. The system CH3OH-H2O-LiCl

Ivan Horsák

Laboratory of Computing Techniques, Charles University, 128 40 Prague 2


A lattice model proposed to describe the thermodynamic properties of binary electrolyte solutions over the whole concentration range has been extended to ternary systems involving two solvents. The relationships derived for the excess Gibbs energy and the activity coefficients of all the components have been tested with published experimental data on vapour pressures of methanol and water in the system CH3OH-H2O-LiCl at 60 °C. Examination of the ability of the model to predict the behaviour of the ternary system on the basis of binary data has shown that the expression for the excess Gibbs energy must be extended to include a ternary contribution.