Abstract

The enthalpies of mixing of aqueous solutions of copper(II) nitrate with aqueous solutions of formamide and α-L-alanine were measured calorimetrically over the whole composition range with respect to amide. The results were used to calculate the standard enthalpies of electrolyte transfer from water into ternary mixtures. The shape and character of electrolyte transfer isotherms are discussed on the basis of the enthalpies of transfer of individual ions studied earlier in a binary solvent and the contributions of universal and chemical interactions between the ion and solvents to these values characterizing structural changes in solution.

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