Chapter 9, Problem 9.22QE

Interpretation Introduction

Interpretation:

The reason behind the exact measurement of bond dissociation energy for $\text{HCl}$ but not $\text{C}\text{}-\text{C}$ bond has to be determined.

Concept Introduction:

The bond dissociation energy or bond energy $\left(D\right)$ is the energy required to break one mole of bonds in a gaseous species.

The equation that describes the bond dissociation for ${\text{H}}_{\text{2}}$ is as follows:

  ${\text{H}}_{\text{2}}\left(\text{g}\right)\to \text{H}\left(\text{g}\right)+\text{H}\left(\text{g}\right)$

Bond dissociation energies are endothermic and have a positive sign. It takes energy to break a bond.