Chapter 18, Problem 18.16E

Interpretation Introduction

(a)

Interpretation:

The value of $q_{\text{elect}}$ for ${\text{He}}_2$ at $4.2\text{K}$ is to be calculated.

Concept introduction:

The point at which the bond between the two atoms become nonexistent thus the molecule exists as two separated atoms are known as dissociation limit. The relation between $D_0$ and $D_{\text{e}}$ is given by the formula,

$D_0=D_{\text{e}}-\frac{1}{2}hv$

Where,

• $D_0$ represents dissociation energy.

• $h$ is the Plank’s constant.

• $v$ is vibrational frequency.

• $D_{\text{e}}$ is the minimum potential energy of ground electronic state with respect to the zero points.

Interpretation Introduction

(b)

Interpretation:

Whether it is expected that ${\text{He}}_2$ exist at room temperature $\left(\sim 300\text{K}\right)$ or not is to be stated. The explanation corresponding to the answer is to be stated.

Concept introduction:

The point at which the bond between the two atoms become nonexistent thus the molecule exists as two separated atoms are known as dissociation limit. The relation between $D_0$ and $D_{\text{e}}$ is given by the formula,

$D_0=D_{\text{e}}-\frac{1}{2}hv$

Where,

• $D_0$ represents dissociation energy.

• $h$ is the Plank’s constant.

• $v$ is vibrational frequency.

• $D_{\text{e}}$ is the minimum potential energy of ground electronic state with respect to the zero points.