Q156 / 180 · KCET 2023 · Physics

Pressure of ideal gas at constant volume is proportional to

  • A
    force between the molecules
  • B
    average potential energy of the molecules
  • C
    total energy of the gas
  • Correct answer
    D
    average kinetic energy of the molecules

Solution

Gay Lussac's law states that the pressure of a fixed mass of a gas at constant volume is directly proportional to the temperature. i.e. $p \propto T$ or $p \propto \frac{1}{2} K_B T$ Since kinetic energy of the molecules is directly proportional to the temperature.

Hence, the correct answer is option: 'D'.

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