At constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with increase in temperature due to:

Options

A. Increase in average molecular speed
B. Increase in the rate of collisions among the molecules
C. Increase in the molecular attraction
D. Decrease in the mean free path

Explanation

Pressure on the walls of the container is equal to the change of momentum per unit time per unit area. At constant volume, for a fixed number of moles of a gas, the pressure increases with rise in temperature due to increase in average molecular speed. This increases the change in momentum during collisions.