Concept explainers
Interpretation: From the given rate of effusion of two gases, molar mass of the unknown gas should be determined.
Concept introduction:
Effusion is used to describe the passage of a gas through a tiny particle into an evacuated chamber.
The rate of effusion is the measure speed at which the gas is transferred to the chamber.
According to Thomas Graham the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles.
The relative rate of effusion of two gases at the same temperature and pressure are the inverse ratio of the square root of the masses of the gases particles. That is,
This equation is known as Graham’s law of effusion.

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Chapter 8 Solutions
EBK CHEMISTRY: AN ATOMS FIRST APPROACH
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