Enthalpy minus the product of thermodynamic temperature and entropy. It was formerly called free energy or free enthalpy.
Green Book, 2nd ed., p. 48 [Terms
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)
) on page 2192 [Terms
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)
) on page 975 [Terms