In an ideal gas at temperature T, the average force that a molecule applies on the walls of a closed container depends on T as Tq.A good estimate for q is

Time interval between two successive collision at a face is 2l/u.Number of Collisions=u2lChange of momentum /collision =2muu2l×2mu=mu2l=F F∝u2⇒F∝TTherefore , q=1