Enthalpies and entropies of transfer of rubidium chloride from water to aqueous N, N-dimethylformamide solutions

Abstract

Enthalpies of solution of rubidium chloride are measured in mixtures of water and N, N-dimethylformamide at 25°C by means of a calorimeter of the constant temperature-environment type. The standard enthalpies of solution appear to be nearly proportional to the solvent composition. Combination of the present results with Gibbs free energies of transfer given in the literature yield the entropies of transfer. The path of the Gibbs free energies of transfer from the mixtures to water is largely determined by the entropic contribution.