Question

The total kinetic energy of translatory motion of all the molecules of 5 litres of nitrogen exerting a pressure P is 3000 J. 

(A) The total K.E. of 10 litres of N₂ at a pressure of 2P is 3000 J 

(B) The total K.E. of 10 litres of He at a pressure of 2P is 3000 J 

(C) The total K.E. of 10 litres of Q₂ at a pressure of 2P is 20000 J 

(D) The total K.E. of 10 litres of Ne at a pressure of 2P is 12000 J

Answer 1

Correct option  (C, D)

Explanation:

Total K.E. of 10 l of gas at Pressure 2P for a monoatomic 

Total K.E. of 10 l, 2P pressure for a diatomic gas = 5/2 PV

Note: In options its asked total K.E. not translational K.E