surface excess Helmholtz energy

Defined by:

$A σ = U σ − T S σ$

where $U σ$ is the surface excess energy, $T$ is the thermodynamic temperature, and $S σ$ is the surface excess entropy.

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

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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.

Last update: 2011-10-11; version: 2.3.

DOI of this term: doi:10.1351/goldbook.S06177.

Original PDF version: http://www.iupac.org/goldbook/S06177.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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