standard equilibrium constant, $K °$ , $K$

Synonym: thermodynamic equilibrium constant

Quantity defined by $K ° = e − Δ r G ° / R T$ where $Δ r G °$ is the standard reaction Gibbs energy, $R$ the gas constant and $T$ the thermodynamic temperature. Some chemists prefer the name thermodynamic equilibrium constant and the symbol $K$ .

Source:

Green Book, 2nd ed., p. 50

See also: PAC, 1994, 66, 533 (Standard quantities in chemical thermodynamics. Fugacities, activities and equilibrium constants for pure and mixed phases (IUPAC Recommendations 1994)) on page 548

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

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.S05915.

Original PDF version: http://www.iupac.org/goldbook/S05915.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 The PDF version is out of date and is provided for reference purposes only.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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standard entropy of activation, $Δ ‡ S °$ , $Δ ‡ S$		standard Gibbs energy of activation $Δ ‡ G °$ , $Δ ‡ G$

standard equilibrium constant, ,

Synonym: thermodynamic equilibrium constant

standard equilibrium constant, $K °$ , $K$