∆G=∆H−T∆S For an endothermic reaction, ∆H=+ ve and at low temperature ∆S=+ ve Hence ∆G=(+)∆H−T(+)∆S and if T∆S<∆H (at low temp) ∆G=+ve (non spontancous) But at high temperature, reaction becomes spontaneous i.e. ∆G=−ve because at higher temperature T∆S>∆H