Thermodynamics of Liquid-Liquid Distribution Reactions II. Lithium Bromide-Water-2-Ethylhexan-1-ol System

Yizhak Marcus*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The standard molar enthalpy of transfer of lithium bromide between aqueous solutions and 2-ethylhexanol solutions is obtained directly by two-phase calorimetry. Heats of dilution are also obtained to give the corrected ΔHtr°/(kJ mol−1) = −7.69 ± 0.21. The corresponding unitary Gibbs energy change and entropy change are ΔGtr°/(kJ mol−1) = 15.21 and ΔStr°/(JK−1 mol−1) = −77.3. The entropy effect which dominates the transfer at infinite dilution is due to loss of water structure breaking by the bromide ion on transfer. The transfer in concentrated solutions, however, is dominated by the exothermic ion-pairing enthalpy.

Original languageEnglish
Pages (from-to)141-144
Number of pages4
JournalJournal of Chemical and Engineering Data
Volume20
Issue number2
DOIs
StatePublished - 1 Apr 1975
Externally publishedYes

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