• ∆G gives a criteria for spontaneity at constant pressure and temperature
• If, ∆G = -ve (<0) ⇒ Process is spontaneous.
• If, ∆G = +ve (>O) ⇒ Process is non-spontaneous
• It, ∆G = O ⇒ Process is in equilibrium
• ∆G° is the Gibbs energy change for a process when all the reactants and products are in their standard states.
