Chapter 8, Problem 8.9YT

(a)

Interpretation Introduction

Interpretation:

The percentage of molecules at ${\text{100 }}^{\text{o}}\text{C}$ having enough energy to surmount an energy barrier of $\text{15 kJ/mol}$ is to be estimated using figure $\text{8-5}$.

Concept introduction:

The percentage of molecules with sufficient energy decreases as the size of the energy barrier increases; the percentage of molecules that are able to surmount the energy barrier decreases by a factor of $\sim 20$. As the temperature increases, the percentage also increases.

(b)

Interpretation Introduction

Interpretation:

The percentage of molecules at ${\text{100 }}^{\text{o}}\text{C}$ having enough energy to surmount an energy barrier of $\text{25 kJ/mol}$ is to be estimated using figure $\text{8-5}$.

Concept introduction:

The percentage of molecules with sufficient energy decreases as the size of the energy barrier increases; the percentage of molecules that are able to surmount the energy barrier decreases by a factor of $\sim 20$. As the temperature increases, the percentage also increases.