Based on given information ΔGo(CaO)=−604.2 kJ/mol and ΔGo(Al2O3)=−1582 kJ/mol, which of the following is feasible?

3Ca+Al2O3→2Al+3CaOΔGo=3×ΔGo(CaO)−ΔGo(Al2O3)=3×(−604.2)−(−1582)=−1812+1582=−230 kJΔGo is negative. Hence, this reaction is feasible.