Enthalpy Interaction Coefficients of Silver, Cadmium and Gold in Dilute Quaternary Tin-Rich Solutions

摘要

Equations for the heat effects of additions of mixtures of multicomponent phases to a solution have been derived in terms of the enthalpy interaction coefficients. By these equations and the measured composition dependence of the heat effects on addition of mixtures of silver-cadmium solid solutions and elemental gold to liquid tin-rich solutions, values of the enthalpy interaction coefficients in tin-rich solutions at 541 degrees K have been obtained. Analysis of these results in terms of the regular solution theory and the quasichemical theory suggests that near the melting point of the solvent association in the solution becomes important. (Author)