A mixture of substances B
, ... is called an ideal mixture when
, ... or
are the relative activity
and the activity coefficient
, respectively, of a substance B
in a liquid or solid mixture.
PAC, 1994, 66, 533
(Standard quantities in chemical thermodynamics. Fugacities, activities and equilibrium
constants for pure and mixed phases (IUPAC Recommendations 1994))
on page 543
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