Question
The standard Gibbs free energies for the reactions at 1773K are given below:
C(s)+O2(g)⟶CO2(g);ΔGo=−380 kJmol−1
C(s)+O2(g)⇌2CO(g);ΔGo=−500 kJmol−1
Discuss the probability of reducing Al2O3 and PbO with carbon at this temperature,
4Al+3O2(g)⟶2Al2O3(s);ΔGo=−22500 kJmol−1
2Pb+O2(g)⟶2PbO(s);ΔGo=−120 kJmol−1