Graham’s Law of Diffusion
In the year 1848, a scientist by the name of Thomas Graham made the initial discovery of Graham’s Law. During his experiments with the effusion of gas, he developed an essential theory that the lighter gas molecules will move through the air more quickly than the heavier gas molecules. Graham’s law of effusion is the common name for this law.
This law states that under the constant temperature and pressure of a gas, lighter atoms and molecules will diffuse through the air more quickly than heavier atoms and molecules.
According to this law, the rate at which a gas molecule effuses is inversely related to the square root of the gas’s density or molecular mass.
Graham’s Law of Diffusion
Graham’s law of diffusion is the relationship between a gas’s rate of diffusion or effusion and its molecular weight. The law of diffusion’s basic tenet is that any gas’s rate of diffusion, at any given temperature and pressure, is inversely proportional to the square root of its density. The mechanism by which a gas can escape from the container is known as effusion, and the ability of a gas to spread and occupy all of the volumes that are available to it is known as diffusion.