Hydrophobic interaction in water-ethanol mixtures

M. Yaacobi, A. Ben-Naim*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

The solubility, free energy, entropy, and enthalpy of solutions of methane and ethane were determined in various mixtures of water and ethanol. The hydrophobic interaction for the pair methane-methane was computed, in these mixtures, using an approximate expression derived previously. Also the entropy and the enthalpy associated with the hydrophobic interaction were evaluated from the experimental data. The main finding is the steep decrease in the strength of the hydrophobic interaction as the mixture becomes richer in alcohol. The variation of the corresponding entropy and enthalpy also shows an abrupt change at the composition of xethanol≈0.2. Some interpretations of these findings in terms of structural changes in the solvent are discussed.

Original languageEnglish
Pages (from-to)425-443
Number of pages19
JournalJournal of Solution Chemistry
Volume2
Issue number5
DOIs
StatePublished - Oct 1973

Keywords

  • aqueous solutions
  • ethanol-water system
  • hydrophobic interaction
  • solubility of gases
  • solutions
  • Water

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