Problem: Consider the reactionFe2O3 (s) + 3H2 (g) → 2Fe (s) + 3H2O (g)a. Use ΔG°f values in Appendix 4 to calculate ΔG° for this reaction.

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$$\begin{gathered} \mathbf{\Delta G}{\mathbf{°}}_{\mathbf{rxn}}\mathbf{ }\mathbf{=}\mathbf{ }\mathbf{G}{\mathbf{°}}_{\mathbf{f}\mathbf{,}\mathbf{ }\mathbf{products}}\mathbf{ }\mathbf{-}\mathbf{G}{\mathbf{°}}_{\mathbf{f}\mathbf{,}\mathbf{ }\mathbf{reactants}} \\ \mathbf{\Delta G}{\mathbf{°}}_{\mathbf{rxn}}\mathbf{ }\mathbf{=}[G{°}_{f, \mathrm{Fe} \left(s\right)} + G{°}_{f, H_{2}O \left(g\right)}]\mathbf{ }\mathbf{-}\mathbf{ }\mathbf{[}\mathbf{G}{\mathbf{°}}_{\mathbf{f}\mathbf{,}\mathbf{ }{\mathbf{Fe}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{3}}\mathbf{ }\mathbf{\left(}\mathbf{s}\mathbf{\right)}}\mathbf{ }\mathbf{+}\mathbf{ }\mathbf{G}{\mathbf{°}}_{\mathbf{f}\mathbf{,}\mathbf{ }{\mathbf{H}}_{\mathbf{2}}\mathbf{ }\mathbf{\left(}\mathbf{g}\mathbf{\right)}}\mathbf{]} \end{gathered}$$