∆G (Gibbs' free energy) must be negative for a spontaneous reaction. Using Gibbs' free energy equation, we can find favourable conditions. ∆G=∆H−T∆S...[
∆H= Change in enthalpy ‌
∆S=‌ Change in entropy ‌
T=‌ Temperature ‌
] 1. For ∆G=− ve, ∆H<0 and ∆S>0 at low temperature. 2. For ∆G=− ve, ∆H>0 and ∆S>0 at high temperature. 3. For ∆G=− ve, ∆H<0 and ∆S<0 at low temperatúre.