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  1. chem.libretexts.org › Gases › Diffusion_and_EffusionDiffusion and Effusion - Chemistry LibreTexts

    Jun 13, 2023 · Effusion. Effusion is the movement of a gas through a tiny hole into a vacuum. We want to know the rate of effusion, which is how much gas moves through the hole per unit time. We assume that the gas particles don't bump into each other while they move through the hole (this means it's a narrow hole in a thin wall).

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  3. en.wikipedia.org › wiki › EffusionEffusion - Wikipedia

    In medical terminology, an effusion refers to accumulation of fluid in an anatomic space, usually without loculation. Specific examples include subdural, mastoid, pericardial and pleural effusions.

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  5. chem.libretexts.org › Bookshelves › General_Chemistry9.4: Effusion and Diffusion of Gases - Chemistry LibreTexts

    Aug 26, 2023 · A process involving movement of gaseous species similar to diffusion is effusion, the escape of gas molecules through a tiny hole such as a pinhole in a balloon into a vacuum (Figure \(\PageIndex{2}\)). Although diffusion and effusion rates both depend on the molar mass of the gas involved, their rates are not equal; however, the ratios of ...

  6. library.fiveable.me › key-terms › ap-chemEffusion - Vocab, Definition, and Must Know Facts | Fiveable

    Effusion is the process by which gas particles pass through a tiny opening from a region of high pressure to one of lower pressure. Related terms. Graham's Law: This law states that the rate of effusion (or diffusion) for a gas is inversely proportional to the square root of its molar mass.

  7. chem.libretexts.org › Bookshelves › Physical_and2.5: Graham’s Law of Effusion - Chemistry LibreTexts

    Jan 16, 2023 · Effusion is defined as a loss of material across a boundary. A common example of effusion is the loss of gas inside of a balloon over time. The rate at which gases will effuse from a balloon is affected by a number of factors.

  8. pathwaystochemistry.com › effusion-and-diffusionEffusion and Diffusion | Pathways to Chemistry

    We can define effusion as a process by which a gas escapes through a small hole in its container into an evacuated space. Graham’s Law of Effusion states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.

  9. openstax.org › books › chemistry-2e9.4 Effusion and Diffusion of Gases - Chemistry 2e | OpenStax

    Define and explain effusion and diffusion; State Graham’s law and use it to compute relevant gas properties

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