Chapter 13, Problem 13.63SP

Interpretation Introduction

Interpretation:

By using chemical kinetics, the given reaction is endothermic or exothermichas to be predicted.

Concept introduction:

Temperature dependent of$K_c$:

Exothermic reaction:

Activation energy ${\text{E}}_{\text{a}}$ of forward reaction is less than ${\text{E}}_{\text{a}}$ of reverse reaction. As temperature rises ${\text{k}}_{\text{r}}$ is greater than ${\text{k}}_{\text{f}}$ so equilibrium constant decreases.

Endothermic reaction:

Activation energy ${\text{E}}_{\text{a}}$ of forward reaction is greater than ${\text{E}}_{\text{a}}$ of reverse reaction. As temperature rises ${\text{k}}_{\text{f}}$ is greater than ${\text{k}}_{\text{r}}$ so equilibrium constant increases.