driving force (affinity) of a reaction, \(A\)

The decrease in Gibbs energy on going from the reactants to the products of a @C01033@ (\(-\Delta G\)).
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1107 [Terms] [Paper]
See also:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2237 [Terms] [Paper]