+Free Energy represents the portion of a system's [energy](/wiki/energy) available to do useful [work](/wiki/work) at a constant temperature. It's the driving force predicting the spontaneity of chemical reactions and physical processes within [Thermodynamics](/wiki/thermodynamics).
+## See also
+- [Gibbs Energy](/wiki/gibbs_energy)
+- [Helmholtz Energy](/wiki/helmholtz_energy)
+- [Entropy](/wiki/entropy)
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