A Prediction of the Excess Partial Molar Free Energies of MgCl2 in the KCL-MgCl2-LiCl Molten Salt System Containing MgCl2 below 0.5 from Thermodynamic Properties of Binary Systems

The thermodynamical properties of MgCl2 in KCI-MgCI2-LiCI molten electrolytes containing MgCI2 below 0.5 (mole fraction, the same below) have been determined from the interchange energies of two binary systems KCI-MgCI2 and LiCI-MgCI2, by means of a model on the assumptions that the electrolytes in the solution are treated as independent particles instead of their ion forms and the interchange energy between the component pair KCI-LiCI is ignored when compared with those of component pairs KCI-MgCl2 and MgCl2-LiCI. The interchange energies, (omega)KCl-MgCl2 and (omega)Mgcl2-LiCl, are obtained as -70000 and -13800 J.mol^-1 from the corresponding binary solutions, respectively.