C2H6(g)+7Cl2(g)→2CCl4(g)+6HCl(g)
ΔS∘rxn = ΔS∘f products - ΔS∘f reactants
          Â
= 6*186.9+2*309.85 - (229.6+7*223)
          Â
= -49.5J/mole-K
C2H6(g)+7Cl2(g)→2CCl4(g)+6HCl(g)
ΔG∘rxn = ΔG∘f products - ΔG∘f reactants
            Â
= 6*-95.3 + 2*-60.6 -(-32.82 + 7*0)
           Â
= -660.2KJ/mole
BaO(s)+CO2(g)→BaCO3(s)
ΔH∘rxn = ΔH∘f products - ΔH∘f reactants
            Â
= 112.1-(70.4 + 213.6)
             Â
= -171.9KJ/mole
BaO(s)+CO2(g)→BaCO3(s)
ΔG∘rxn = ΔG∘f products - ΔG∘f reactants
             Â
= -1137-(-520.4 -394.4)Â Â = -222.2KJ/mole
