IUPAC - surface excess entropy (S06175)

surface excess entropy

https://doi.org/10.1351/goldbook.S06175

Defined by:

S^{σ} = S - S^{α} - S^{β} = S - V^{α} \frac{S_{m}^{α}}{V_{m}^{α}} - V^{β} \frac{S_{m}^{β}}{V_{m}^{β}}

(

\frac{S_{m}^{α}}{V_{m}^{α}}

) and (

\frac{S_{m}^{β}}{V_{m}^{β}}

) are the entropy densities in the two bulk phases, where

S_{m}^{α}

and

S_{m}^{β}

are the mean molar entropies and

V_{m}^{α}

and

V_{m}^{β}

are the mean molar volumes of the two phases.

Source:
PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 599 [Terms] [Paper]

Citation: 'surface excess entropy' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S06175 RIS BibTex EndNote

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surface excess entropy