Graham's Law of Effusion

Description

Effusion is the process in which a gas escapes through a small hole. This occurs if the diameter of the hole is considerably smaller than the mean free path of the molecules. According to Graham’s law, the rate at which gases effuse (i.e., how many molecules pass through the hole per second) is dependent on their molecular weight. Graham’s law states that the rate of effusion of a gas is inversely proportional to the square root of the molar mass of its particles.