Chapter 19, Problem 61E

Determine $\Delta G°$ for the reaction:

   ${\text{Fe}}_2{\text{O}}_3(s)+\frac{3}{2}{\text{O}}_2(g)\to 2\text{Fe}(s)+3{\text{CO}}_2(g)$

Use the following reactions with known $\Delta G_{\text{rxn}}^{°}$ values:

   $\text{2Fe}(s)+\frac{3}{2}{\text{O}}_2(g)\to {\text{Fe}}_2{\text{O}}_3(s)+3{\text{CO}}_2(g)\Delta G_{\text{rxn}}^{°}=-742.2\text{ kJ}$

   $\text{CO}(g)+\frac{1}{2}{\text{O}}_2(g)\to 3{\text{CO}}_2(g)\Delta G_{\text{rxn}}^{°}=-257.2\text{ kJ}$