Another thermodynamic quantities that helps in predicting the spontaneity of a process is Gibbs free energy or Gibbs energy of Gibbs function. It is denoted by G and is given by the equation G=H -TS where H is the heat content ,T is the absolute temperature and S is the entropy of the system. G1 = H1 -TS1 for the initial state G2 = H2 -TS2 for the final … [Read more...] about Gibbs Free Energy