Chapter 10, Problem 10.98SP

Interpretation Introduction

Interpretation:

Out of ${\text{H}}_{\text{2}}$ at $\text{150 K}$ and $\mathrm{He}$ at $375°\text{C}$, the one that has a higher average speed is to be identified.

Concept introduction:

In accordance with the kinetic-gas theory, the relation between average speed, temperature, and molar mass is as follows:

$u=\sqrt{\frac{3RT}{M}}$

Where

• $R$ is gas constant.
• $T$ represents temperature in kelvins.
• $M$ represents the molar mass in $\text{kg/mol}$.