Chapter 5, Problem 53E

Interpretation Introduction

Interpretation:

The root mean square velocity and kinetic energy of ${\text{F}}_2\text{,}{\text{Cl}}_2$ and ${\text{Br}}_2$ at $298\text{K}$ is to be calculated; also the order of rate of effusion for the given gases is to be predicted.

Concept Introduction: The root mean square speed of the gas molecules is calculated by the formula,

$u_{\text{rms}}=\sqrt{\frac{3RT}{M}}$

The average kinetic energy of gas molecules is determined by using the formula,

$\text{K}{\text{.E}}_{\text{AV}}=\frac{3}{2}RT$

To determine: The root mean square velocity and kinetic energy of ${\text{F}}_2\text{,}{\text{Cl}}_2$ and ${\text{Br}}_2$ at $298\text{K}$ and the order of rate of effusion of these gases.