Thermodynamic properties of the binary molten salt systems, PbBr₂-KBr, PbBr₂-RbBr and PbBr₂-CsBr, by measurement of the electromotive forces of galvanic cells

Abstract

The electromotive forces of galvanic cells for the formation of PbBr₂ in the molten binary salt systems, PbBr₂-KBr, PbBr₂,-RbBr and PbBr₂-CsBr, have been measured. Activities, activity coefficients and partial molar free energies have been calculated for each component of the three systems. Integral free energies of mixing have also been calculated. Various models of mixing of molten salts have been applied to the results. The systems contain complex ions, probably mixtures of PbBr₄^2-, PbBr₆^4- with some PbBr^3-.