## Wikipedia - Aktivität (Chemie) (de) Wikipedia - Happamuus (fi) Wikipedia - PH (en) Wikipedia - Thermodynamic activity (en) Wikipedia - User:Doputadwadads (en) Wikipedia - Активность (химия) (ru) Wikipedia - فاعلية (كيمياء) (ar) activity (relative activity), $$a$$

https://doi.org/10.1351/goldbook.A00115
Defined by the equation $a = e^{\frac{\mu - \mu^{o}}{R\,T}}$ where $$R$$ is the @[email protected], $$T$$ the @[email protected], $$\mu$$ the @[email protected] and $$\mu^{o}$$ the @[email protected] the definition of which depends on the choice of the @[email protected]
See also:
absolute activity
Sources:
Green Book, 2nd ed., p. 49 [Terms] [Book]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 989 [Terms] [Paper]