Journal of Solution Chemistry

, Volume 5, Issue 8, pp 529–542 | Cite as

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

  • Michael H. Abraham
  • Angela F. Danil de Namor
  • Ronald A. Schulz
Article

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 s o values for these electrolytes. It is shown that values of ΔH t o 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 t o values with previously determined ΔG t o values yield values of ΔS t o for transfer of 1∶1 electrolytes from water to the dichloroethanes. These ΔS t o values are mostly very negative; they can be correlated very well by the method of Abraham, and in this way ΔS t o 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.

Key words

Electrolytes anions cations heats enthalpies entropies solution transfer 1,1-dichloroethane 1,2-dichloroethane 

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Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • Michael H. Abraham
    • 1
  • Angela F. Danil de Namor
    • 1
  • Ronald A. Schulz
    • 1
  1. 1.Department of ChemistryUniversity of SurreyGuildfordEngland

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