Select correct statement

(1) When the oxide undergoes a phase change, there will be an increase in the entropy of the oxide.(2)  It is true statements, HgO⟶ΔHg+1/2O2(3) For a reduction process the change in the free energy, ΔG∘ must be negative and to make ΔG∘ negative temperature should be high enough so that T∆S°>∆H°.