surface excess enthalpy

Defined by:

$H σ = U σ − γ A s$

where $U σ$ is the surface excess 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