transfer activity coefficient, \(\mathit{\gamma}_{\text{t}}\)
A term used to quantify the difference in the free energy of a solute ion in two different standard states often in two different liquid phases. The relationship is Δ t G° = ν R T ln γ t where Δ t G° is the transfer Gibbs energy and ν is the number of ions in the solute.
  1. It should not be confused with the mass transfer @C01124@ which represents the specific rate of transfer of a species from one phase to another.
  2. It does not necessarily imply the physical transfer of a solute between two liquid phases.
See also: partition constant
PAC, 1993, 65, 2373. 'Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)' on page 2386 (