Abstract
Heats of solution of nine electrolytes in 1,2-dichloroethane and of three electrolytes in 1,1-dichloroethane have been determined calorimetrically at various electrolyte concentrations and extrapolated to zero concentration to yield ΔH os values for these electrolytes. It is shown that values of ΔH ot for transfer from water to the dichloroethanes of 1∶1 electrolytes are often negative, so that these electrolytes can be more stable enthalpically in the less polar solvents. Combinations of the ΔH ot values with previously determined ΔG ot values yield values of ΔS ot for transfer of 1∶1 electrolytes from water to the dichloroethanes. These ΔS ot values are mostly very negative; they can be correlated very well by the method of Abraham, and in this way ΔS ot values for transfer of numerous other anions and cations have been predicted. The Ph4As+/Ph4B− convention yields single-ion entropies of transfer from water to the dichloroethanes in reasonable agreement with values calculated by the correspondence-plot method.
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Abraham, M.H., Danil de Namor, A.F. & Schulz, R.A. Heats of solution of 1:1 electrolytes in 1,2- and 1,1-dichloroethane and derived enthalpies and entropies of transfer of electrolytes from water to these solvents. J Solution Chem 5, 529–542 (1976). https://doi.org/10.1007/BF00647376
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DOI: https://doi.org/10.1007/BF00647376