**Question **# Use the specific heat capacity and latent heat tables as needed to answer the followingquestions. \text { a. Use enthalpies of formation to determine the } \Delta H_{\text {reaction }} \text { for the reaction } \mathrm{CaCl}_{2}(s) \rightarrow \mathrm{CaCl}_{2}(\mathrm{aq}) . \text { (2 points) } b. Use Hess's law and the following equations to calculate the AH,eaction for the reaction \mathrm{C}_{3} \mathrm{H}_{8}(g)+5 \mathrm{O}_{2}(g) \rightarrow 3 \mathrm{CO}_{2}(g)+4 \mathrm{H}_{2} \mathrm{O}(I) \text {. (Show your work.) (4 points) } \text { - } 3 \mathrm{C}(s)+3 \mathrm{O}_{2}(g) \rightarrow 3 \mathrm{CO}_{2}(g) \quad \Delta H=-1186.5 \mathrm{~kJ} \text { - } 4 \mathrm{H}_{2}(g)+2 \mathrm{O}_{2}(g) \rightarrow 4 \mathrm{H}_{2} \mathrm{O}(I) \quad \Delta H=-1143.32 \mathrm{~kJ} \text { c. Use the equation } \mathrm{N}_{2}(g)+2 \mathrm{O}_{2}(g) \rightarrow 2 \mathrm{NO}_{2}(g), \Delta H=66.2 \mathrm{~kg} \text {, for the following questions. } \text { i. Is the formation of nitrogen dioxide }\left(\mathrm{NO}_{2}\right) \text { an exothermic or endothermic reaction? } \text { Draw a potential energy diagram for the reaction. } \text { Label the graph with the following: "Reactants," "Products," " } \Delta H_{\text {reaction," }} \text { and " } E_{a} \text {. } 3 \mathrm{C}(\mathrm{s})+4 \mathrm{H}_{2}(g) \rightarrow \mathrm{C}_{3} \mathrm{H}_{8}(g) \quad \Delta \mathrm{H}=-103.85 \mathrm{~kJ}