Question

OR
Derive an expression for pressure exerted by ideal gas?​

Answer 1

Let us consider two faces of the cube, say P and Q, normal to x−axis.When the molecule collides with the side Q with a velocity u, it rebounds with −u, while its other components remain unchanged.

Change in momentum of the molecule due to this collision =−2mu, which is imparted to the wall per collision.

The time taken by molecule to cover dis