Thermodynamics: Free Energy Change

Gibbs Free Energy change (∆G) must be zero or negative for a feasible change.
It is determined by the balance of enthalpy and entropy at a specific temperature.
The key equation is ∆G = ∆H – T∆S.
This equation is used to find how ∆G changes with temperature.
It also helps determine the temperature at which a reaction becomes feasible.