What is the average kinetic energy of molecules of an ideal gas leaking freely through an orifice of a container which has $N$ molecules at pressure $P$ in volume $V$ ?

• Correct answer
  A

  $\frac{3 P V}{2 N}$
• B

  $\frac{ P V}{2 N}$
• C

  $\frac{3 P V}{ N}$
• D

  $\frac{2 P V}{3 N}$

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