Chapter 13, Problem 45TS

To determine

(a)

Whether the reaction ${\text{N}}_2{\text{H}}_4\to {\text{2H}}_2+{\text{N}}_{\text{2}}$ is an exothermic or endothermic reaction.

To determine

(b)

Whether the reaction ${\text{2H}}_{\text{2}}{\text{O}}_2\to {\text{O}}_{\text{2}}+{\text{2H}}_{\text{2}}\text{O}$ is an exothermic or endothermic reaction.