Certified Hyperbaric Technologist Practice Test

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Which law is related to the diffusion of gases?

Boyle's Law
Graham's Law
Henry's Law
Dalton's Law

The correct answer is: Graham's Law

Graham's Law is directly related to the diffusion of gases. It describes the relationship between the rate of diffusion of a gas and its molar mass. Specifically, Graham's Law states that the rate of diffusion of a gas is inversely proportional to the square root of its molar mass. This means that lighter gases will diffuse more quickly than heavier gases. For example, if you were to compare two gases, the one with a lower molar mass would move faster than the one with a higher molar mass, exhibiting a clear and predictable pattern in their diffusion rates. The other laws mentioned have their own specific applications in the field of gas behavior. Boyle's Law relates to the pressure and volume of a gas at a constant temperature, Henry's Law pertains to the solubility of gases in liquids, and Dalton's Law deals with the partial pressures of gases in a mixture. While they all contribute to our understanding of gas behavior, only Graham's Law specifically addresses the characteristics and principles of gas diffusion, making it the most relevant choice in this context.