Graham's law


Graham's law
The statement that the rate of effusionThe escape of a gas through an orifice. of a gasA state of matter in which a substance occupies the full volume of its container and changes shape to match the shape of the container. In a gas the distance between particles is much greater than the diameters of the particles themselves; hence the distances between particles can change as necessary so that the matter uniformly occupies its container. is inversely proportional to the square root of the molar massThe mass of a mole of substance; the same as molecular weight for molecular substances. of the gas.