## surface excess Gibbs energy

https://doi.org/10.1351/goldbook.S06176
Defined by $G^{\sigma }=H^{\sigma }- T\ S^{\sigma }=A^{\sigma }- \gamma \ A_{\text{s}}$ where $$H^{\sigma }$$ is the @S06174@, $$T$$ is the @T06321@, $$S^{\sigma }$$ is the @S06175@, $$A^{\sigma }$$ is the @S06177@, $$\gamma$$ is the @S06192@, and $$A_{\text{s}}$$ is the area relative to a @G02635@.
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]