I am a senior three, which I learned by taking part in a chemistry competition. Gibbs free energy is a criterion to judge whether a reaction can proceed spontaneously. The formula is G=△H-T△S, where △H is enthalpy change, t is temperature and △S is entropy change. When G 0, this reaction will never happen, so it is unnecessary to study a reaction in the future. When g > 0, there is no need to study this reaction! ! I hope it helps you! !