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AP Chemistry
Effusion is the process by which gas particles pass through a tiny opening from a region of high pressure to one of lower pressure.
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This law states that the rate of effusion (or diffusion) for a gas is inversely proportional to the square root of its molar mass.
Pressure Gradient: This refers to the change in pressure across distance, which often drives effusion.
Permeability: This term describes how easily a substance can pass through a material or membrane.