Question

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

• A. Increase in average molecular speed
• B. Increase in rate of collisions amongst molecules
• C. Increase in molecular attraction
• D. Increase in mean free path

Answer 1

Answer: (A)

Increase in average molecular speed

At constant volume for a fixed number of moles of gas, the pressure of the gas increases with the rise in temperature due to Increase in average molecular speed as a result of which more number of collisions between molecules leads to more pressure.

Hence option A is correct.