Chapter 21, Problem 81AP

Interpretation Introduction

Interpretation:

The probability of photolyzation of ${\text{CH}}_{\text{3}}\text{Br}$ in the troposphere, is to be determined with given bond enthalpy.

Concept introduction:

Bond enthalpy (also known as bond energy) is the amount of energy that isessentialin order to break one mole of the stated bond.

The energy needed to break one $\text{C-Br}$ bond is calculated as:

$E=\left(\frac{\text{Bond}\text{enthalpy}}{\text{1}\text{mol}}\right)\left(\frac{\text{1}\text{mol}}{\text{6}{\text{.022×10}}^{\text{23}}\text{molecule}}\right)$

The energy of the photon is calculated by the expression represented below: $\text{E}\text{=}\frac{\text{hc}}{\text{λ}}$

Here $\text{h}$ isPlanck’s constant, c is the speed of light in vacuum and $\lambda$ is the wavelength of the photon, and $E$ is the energy of the photon.