What is the relationship between molecular mass and rate of 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.

How is the rate of diffusion ratio calculated?

Key Equations

1. rate of diffusion=amount of gas passing through an areaunit of time.
2. rate of effusion of gas Arate of effusion of gas B=√mB√mA=√MB√MA.

Which pair of gases have same rate of diffusion?

Rate of diffusion depends upon the molecular masses of gases. Therefore, the gases which have equal molecular mass, have equal rates of diffusion.

How is rate of diffusion related to pressure?

The value of compression of two gases, the rate of diffusion through a fine hole. Therefore, the rate of diffusion of a gas is inversely proportional to both time and square root of molecular mass. It is also inversely proportional to the square root of density. But it is directly proportional to pressure.

How does diffusion gradient affect the rate of diffusion?

Extent of the concentration gradient: The greater the difference in concentration, the more rapid the diffusion. The closer the distribution of the material gets to equilibrium, the slower the rate of diffusion becomes.

What is the rate of diffusion of hydrogen gas?

Hence, the rate of diffusion of hydrogen is about 1.4 times that of He.

Which of the following gases always show positive deviation from ideal Behaviour?

It is observed that H2 and He gases always show positive deviation from ideal behaviour i.e., Z > 1 .

Which pair of gases diffuses with same rate at same temperature and pressure?

NO2,SO2.

Which of the following pairs of gases have same rate of diffusion under similar conditions?

Dideuterium and helium have same molar mass. Hence, they will effuse with identical rate under identical conditions.