Laws governing gas diffusion ■ Grahan'sLaW When gases are dissolved in liquids, the relative rate of diffusion of a given gas is proportional to its solubility in the liquid and inversely proportional to the square root of its molecular mass diffusion rate of COz: 2232=19 diffusion rate of 02 44Laws governing gas diffusion ◼ Graham's Law When gases are dissolved in liquids, the relative rate of diffusion of a given gas is proportional to its solubility in the liquid and inversely proportional to the square root of its molecular mass