What is the average speed (actually the root-mean-square speed)of a xenon atom at 27°C?
A)2.27 m/s
B)7.57 m/s
C)71.7 m/s
D)239 m/s

Question

Quizplus · Accepted Answer

The root-mean-square speed of a gas molecule is calculated using the formula: $ v_{rms} = \sqrt{\frac{3kT}{m}} $, where $ k $ is the Boltzmann constant, $ T $ is the temperature in Kelvin, and $ m $ is the mass of a molecule. For xenon at 27°C (300K), the calculation gives approximately 239 m/s.

What Is the Average Speed (Actually the Root-Mean-Square Speed)of a Xenon