Calculate ΔGo for the following reaction given the following thermodynamic properties at 25oC:   Fe2O3(s)   +   3H2(g)   →   2 Fe(s)   +   3 H2O(g) ΔH°f (kJ/mol)   -824.2                  0                        0                -241.8 S°(J/mol∙K         87.4                 130.6                  27.3               188.8

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