Is diffusion dependent on molar mass?

Is diffusion dependent on molar mass?

Although diffusion and effusion rates both depend on the molar mass of the gas involved, their rates are not equal; however, the ratios of their rates are the same.

What is the effect of molar mass on rates of diffusion and effusion?

The rate of effusion of a gaseous substance is inversely proportional to the square root of its molar mass. Thus the rate at which a molecule, or a mole of molecules, diffuses or effuses is directly related to the speed at which it moves.

Does higher molar mass diffuse faster?

This is because at a given temperature, all gas particles in a sample will have the same average kinetic energy. Consequently, we would expect gas particles with a higher molar mass to effuse more slowly than gases with a lower molar mass. This means that Gas B should effuse faster than Gas A.

How does mass of particle affect the rate of diffusion?

Mass of Particle: Heavier particles will move more slowly and so will have a slower rate of diffusion. Smaller particles on the other hand will diffuse faster because they can move faster.

How does molar mass affect kinetic energy?

In according with the Kinetic Molecular Theory, each gas molecule moves independently. However, the net rate at which gas molecules move depend on their average speed. By examining the equation above, we can conclude that the heavier the molar mass of the gas molecules slower the gas molecules move.

What factors affect the rate of diffusion?

The greater the difference in concentration, the quicker the rate of diffusion. The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. The greater the surface area, the faster the rate of diffusion.

What affects the rate of diffusion?

Why do heavier molecules diffuse slower?

Since all gases have the same average kinetic energy at the same temperature, lighter molecules move faster and heavier molecules move slower on average.

Does molar mass affect kinetic energy?

As such, it can be concluded that the average kinetic energy of the molecules in a thermalized sample of gas depends only on the temperature. However, the average speed depends on the molecular mass. So, for a given temperature, light molecules will travel faster on average than heavier molecules.

What affects diffusion rate?

How does molecular weight relate to diffusion?

Graham’s law states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight. In the same conditions of temperature and pressure, the molar mass is proportional to the mass density.

Why does mass not affect average kinetic energy?

The last postulate of the kinetic molecular theory states that the average kinetic energy of a gas particle depends only on the temperature of the gas. Because the mass of these particles is constant, their kinetic energy can only increase if the average velocity of the particles increases.