Effusion Definition

Chemistry Glossary Definition of Effusion

This diagram shows effusion (left) and diffusion (right).
This diagram shows effusion (left) and diffusion (right). Effusion occurs through a hole smaller than the mean path of moving particles while diffusion occurs through a hole large enough allow multiple particles to pass at once. Astrang13, Creative Common License

Effusion Definition: ​

Effusion is the movement of a gas through a pore or capillary into another gaseous region or into a vacuum.

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Helmenstine, Anne Marie, Ph.D. "Effusion Definition." ThoughtCo, Mar. 7, 2017, thoughtco.com/definition-of-effusion-604437. Helmenstine, Anne Marie, Ph.D. (2017, March 7). Effusion Definition. Retrieved from https://www.thoughtco.com/definition-of-effusion-604437 Helmenstine, Anne Marie, Ph.D. "Effusion Definition." ThoughtCo. https://www.thoughtco.com/definition-of-effusion-604437 (accessed January 19, 2018).