IUPAC - surface excess Gibbs energy (S06176)

surface excess Gibbs energy

https://doi.org/10.1351/goldbook.S06176

Defined by

G^{σ} = H^{σ} - T S^{σ} = A^{σ} - γ A_{s}

where

H^{σ}

is the surface excess enthalpy,

T

is the thermodynamic temperature,

S^{σ}

is the surface excess entropy,

A^{σ}

is the surface excess Helmholtz energy,

γ

is the surface tension, and

A_{s}

is the area relative to a Gibbs surface.

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 Gibbs energy' 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.S06176 RIS BibTex EndNote

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Last revised: February 24, 2014

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surface excess Gibbs energy