Gibbs film elasticity

https://doi.org/10.1351/goldbook.G02634
Pertains to a
film element
of a
soap film
changing in area at constant mass and is the differential change of its
surface tension
with relative change in area A, E=A (σA)T,p,ni where T is the
thermodynamic temperature
, p is the pressure, and ni is the
amount of substance
of the species i.
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 615 [Terms] [Paper]