Chapter 5, Problem 63E

Calculate $\Delta H_{298}^{°}$ for the process

$\text{Sb}\left(s\right)+\frac{5}{2}{\text{Cl}}_2\left(g\right)\to {\text{SbCl}}_4\left(s\right)$ from the following information:

$\begin{array}{l}\text{Sb}\left(s\right)+\frac{3}{2}{\text{Cl}}_2\left(g\right)\to {\text{SbCl}}_3\left(s\right)\Delta H_{298}^{°}=-314\text{kJ}\\ \text{SbCl}\left(s\right)+{\text{Cl}}_2\left(g\right)\to {\text{SbCl}}_5\left(g\right)\Delta H_{298}^{°}=-80\text{kJ}\end{array}$