Question

The absolute temperature of a gas is determined by

• A. The average momentum of the molecules
• B. The velocity of sound in the gas
• C. The number of molecules in the gas
• D. The mean square velocity of the molecules

Answer 1

Answer: (D)

The mean square velocity of the molecules

Answer 2

Since $v_{rms} \propto \sqrt{T}$. Also mean square velocity $\overline{v^{2}} = v_{rms}^{2}$