Gas which obeys the equation of state

(the ideal gas law;

is the pressure,

the volume,

the amount of molecules,

the
gas constant and

the
thermodynamic temperature). For an ideal gas the
fugacity,
, of each
constituentB is equal to its
partial pressure,
,
, where

is the amount fraction of
B.
Source:
Physical Chemistry Division, unpublished
See also:
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2196
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.