Gibbs energy (function), Math - title

https://dx.doi.org/10.1351/goldbook.G02629
Enthalpy minus the product of thermodynamic temperature and entropy. It was formerly called free energy or free enthalpy.
Source:
PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 975
PAC, 1990, 62, 2167 (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2192