Chapter 4, Problem 4.49E

Determine the value of the derivative ${\left\{\left[\partial \left(\Delta G\right)\right]/\partial T\right\}}_p$ for the solid-state reaction

$2\text{Al}+{\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}\to {\text{Al}}_{\text{2}}{\text{O}}_{\text{3}}+2\text{Fe}$

(Hint: See exercise $3.57$.)