+Gibbs Free Energy ($\Delta G$) is a thermodynamic potential that measures the "useful" work obtainable from an isothermal, isobaric thermodynamic system. A negative $\Delta G$ indicates a [Spontaneous Process](/wiki/spontaneous_process), signaling the system's drive toward [Equilibrium](/wiki/equilibrium) without external energy.
+## See also
+- [Enthalpy](/wiki/enthalpy)
+- [Entropy](/wiki/entropy)
+- [Thermodynamics](/wiki/thermodynamics)