Chapter 5.7, Problem 1CYU

Use Hess’s law to calculate the enthalpy change for the formation of CS₂(ℓ) from C(s) and S(s) [C(s) + 2 S(s) → CS₂(ℓ)] from the following enthalpy values.

$\begin{array}{ll}\text{C(s)}+{\text{O}}_{\text{2}}\text{(g)}\to {\text{CO}}_{\text{2}}\text{(g) }\hfill & {\Delta }_{\text{r}}{H}_1^{\circ }=-393.5\text{ kJ/mol-rxn}\hfill \\ \text{S(s)}+{\text{O}}_{\text{2}}\text{(g)}\to {\text{SO}}_{\text{2}}\text{(g) }\hfill & {\Delta }_{\text{r}}{H}_2^{\circ }=-296.8\text{ kJ/mol-rxn}\hfill \\ {\text{CS}}_{\text{2}}\text{(}\mathcal{l}\text{)}+{\text{3 O}}_{\text{2}}\text{(g)}\to {\text{CO}}_{\text{2}}\text{(g)}+{\text{2 SO}}_{\text{2}}\text{(g) }\hfill & {\Delta }_{\text{r}}{H}_3^{\circ }=-1103.9\text{ kJ/mol-rxn}\hfill \end{array}$