Question

The average velocity of the molecules in a gas in equilibrium is

• A. proportional to $\sqrt{T}$
• B. proportional to T
• C. proportional to $T^2$
• D. equal to zero

Answer 1

Answer: (A)

proportional to $\sqrt{T}$

the average velocity of the gas molecules = $\sqrt{\frac{8RT}{\pi M}}$
so clearly, the average velocity $\alpha \sqrt{T}$
So, A is the correct answer.
Note that T is the temperature in Kelvins