Chapter 11, Problem 11A.12AE

(i)

Interpretation Introduction

Interpretation:

The width of the vibrational spectra when every collision is effective in deactivating the molecule vibrationally has to be calculated.

Concept introduction:

The Heisenberg uncertainty principle gives the relation between the energy of the molecule and its lifetime. The Heisenberg Uncertainty principle for time and energy is given by the formula,

    $\delta E\times \delta t=\frac{h}{\text{2π}}$

(ii)

Interpretation Introduction

Interpretation:

The width of the vibrational spectra when one collision in $100$ is effective has to be calculated.

Concept introduction:

As mentioned in the concept of introduction in part (i).