Chapter 16, Problem 61E

Consider the reaction

${\text{Fe}}_2{\text{O}}_3\left(s\right)+3{\text{H}}_2\left(g\right)\to 2\text{Fe}\left(s\right)+3{\text{H}}_2\text{O}\left(g\right)$

a. Use $\Delta G_{\text{f}}^{\circ }$ values in Appendix 4 to calculate ∆G° for this reaction.

b. Is this reaction spontaneous under standard conditions at 298 K?

c. The value of ∆H° for this reaction is 100. kJ. At what temperatures is this reaction spontaneous at standard conditions? Assume that ∆H° and ∆S° do not depend on temperature.