Question

According to kinetic theory of gases, for a diatomic molecule:

• A. The pressure exerted by the gas is proportional to the mean velocity of the molecule.
• B. The pressure exerted by the gas is proportional to the r.m.s. velocity of the molecule.
• C. The r.m.s. velocity of the molecule is inversely proportional to the temperature.
• D. The mean translational K.E. of the molecule is proportional to the absolute temperature.

Answer 1

Answer: (D)

The mean translational K.E. of the molecule is proportional to the absolute temperature.

Answer 2

K.E. = $\frac{3}{2}$nRT