Question

For a fixed number of moles of a gas at constant volume, the pressure of the gas increases with rise in temperature due to?

• A. increase in average molecular speed
• B. decrease rate of collision amongst molecules
• C. increasing molecular attraction
• D. increase in mean free path

Answer 1

The correct option is 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 an 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.