Molten salt mixtures. X. The thermochemistry of the binary molten salt systems CdCl₂+PbCl₂, CdCl₂+NaCl, CdCl₂+KCI, PbCl₂+NaCl, PbCl₂-KCl, and CdI₂+KI

Abstract

The enthalpy change on cooling molten and solid salts and their mixtures from temperatures as high as 850º down to 26.9º has been measured by means of a Bunsen-type fusion calorimeter. The enthalpy of formation of solid mixtures has also been measured using a water solution calorimeter. From the combined results, heats of mixing have been determined for the molten salt systems investigated. In each system, with the exception of CdCl₂ + PbCl₂, the process of mixing is exothermic and the relative magnitude of the results can be explained by the formation of complex ions in the systems CdC1₂ +NaCl, CdCl₂ +KCl, PbCl₂ +KCl, and CdI₂ +KI. Complex ions have not been detected in the other systems.