THERMODYNAMICS OF TERNARY UNIVARIANT SYSTEMS OF THE TYPE: WATER – METAL SALT – ACID

Abstract

Thermodynamic equations for the variation of vapor pressure and composition with temperature along ternary univariant lines on phase diagrams of systems typified by H2O–ZnSO4–H2SO4 are developed. The usefulness of these equations in testing the consistency of experimental data, in estimating invariant points, and in obtaining thermodynamic data is discussed.