Question

Choose the incorrect statement regarding the energy of gas molecules –

• A. Average KE of a diatomic gas molecule at normal temp is $\frac{5}{2}$kT.
• B. Average translational KE of a molecule is $\frac{1}{2}$ m¢$v_{av}^{2}$ where m¢ is the mass of molecules and v_av is the average speed of the molecules
• C. Average translational KE of all the gas molecules is the same as $\frac{3}{2}$Kt
• D. Rotational KE of all the diatomic gas molecules is the same as kT

Answer 1

Answer: (B)

Average translational KE of a molecule is $\frac{1}{2}$ m¢$v_{av}^{2}$ where m¢ is the mass of molecules and v_av is the average speed of the molecules

Answer 2

It is $\frac{1}{2}$ m¢$v_{rms}^{2}$.