Quantity characterizing the equilibrium of a chemical reaction and defined by an expression
of the type
, where
is the
stoichiometric number of a reactant (negative) or product (positive) for the reaction and
stands for a quantity which can be the equilibrium value either of pressure, fugacity,
amount concentration, amount fraction, molality,
relative activity or reciprocal
absolute activity defining the pressure based, fugacity based, concentration based, amount fraction
based, molality based,
relative activity based or
standard equilibrium constant (then denoted
),
respectively.
Source:
See also:
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2187
PAC, 1996, 68, 957
(Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations
1996))
on page 972
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.
