At a certain temperature Kc = 9.0 for the equilibrium 24() ⇔ 22(). What is Kc at the same temperature for 2() ⇔ 1/224().

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?