Chapter 9, Problem 9.37P

Interpretation Introduction

Interpretation:

The relation between the energy of the bond between a given pair of atoms and the bond order is to be determined.

Concept introduction:

A covalent bond is formed by the interaction of two nonmetals. Covalent compounds are formed by the sharing of electrons between two or more atoms. A covalent bond is the strong forces of attraction between the shared pairs of electrons and the nuclei of the combining atoms.

In the covalent bond, bond energy is the energy needed to overcome the attractive forces between the nuclei of atoms and the shared pair of electrons. Bond energy is the enthalpy change associated with breaking of bond of $1\text{mol}$ of gaseous molecule. The enthalpy associated with equation (1) is $\Delta H_{\text{bond}\text{breaking}}$ or ${\text{BE}}_{\text{AB}}$.

$\text{AB}\left(g\right)\to \text{A}\left(g\right)+\text{B}\left(g\right)$ (1)

Bond order is the number of electron pairs that are shared between the pair of atoms.