Chapter 6, Problem 6.88SP

Calculate the overall energy change in kilojoules per mole for the formation of CaCl(s) from the elements. The following data are needed:
$\begin{array}{l}{E}_{\text{ea}}\text{for Cl}\left(g\right)=-\text{348}\text{.6 kJ/mol}\\ E_{\text{i1}}\text{for Ca}\left(g\right)=+\text{589}.\text{8 kJ/mol}\\ E_{\text{i2}}\text{for Ca}\left(g\right)=+\text{1145 kJ/mol}\\ \text{Heat of sublimation for Cs}\left(s\right)=+1\text{78}.\text{2 kJ/mol}\\ {\text{Bond dissociation energy for Cl}}_{\text{2}}\left(g\right)=+\text{243 kJ}{\text{per mol of Cl}}_2\left(g\right)\\ {\text{Lattice energy for CaCl}}_2\left(s\right)=+2258\text{ kJ/mol}\\ \text{Lattice energy for CaCl}\left(s\right)=+717\text{ kJ/mol}\left(\text{estimated}\right)\end{array}$