The rate constant
for a system in which the reactants
are in thermal equilibrium at a given temperature. In statistical mechanics the expression
' is used to refer to a closed system in thermal equilibrium, the species being present
in a statistical distribution. By contrast, a microcanonical ensemble is composed
of systems all having the same energy: a canonical ensemble therefore consists of
a statistical distribution of microcanonical ensembles. The canonical or thermal rate constant
can be obtained from the microcanonical rate constant
by summing over the energy, taking into account the statistical distribution.
PAC, 1996, 68, 149
(A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC
on page 155
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