Chapter 13, Problem 44TS

To determine

(a)

Whether the reaction ${\text{H}}_{\text{2}}+{\text{Cl}}_{\text{2}}\to \text{2HCl}$ is an exothermic or endothermic reaction.

To determine

(b)

Whether the reaction $\text{2HC}\equiv \text{CH}+{\text{5O}}_{\text{2}}\to {\text{4CO}}_{\text{2}}+{\text{2H}}_{\text{2}}\text{O}$ is an exothermic or endothermic reaction.