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 language | English |
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Pages (from-to) | 141-144 |
Number of pages | 4 |
Journal | Journal of Chemical and Engineering Data |
Volume | 20 |
Issue number | 2 |
DOIs | |
State | Published - 1 Apr 1975 |
Externally published | Yes |