effusionɪˈfyu ʒən
effusion (n)
- plural
- effusions
English Definitions:
effusion, gush, outburst, blowup, ebullition (noun)
an unrestrained expression of emotion
effusion (noun)
flow under pressure
effusion (Noun)
an outpouring of liquid
effusion (Noun)
an outpouring of speech or emotion
effusion (Noun)
the seeping of fluid into a body cavity; the fluid itself
Effusion
In physics, effusion is the process in which individual molecules flow through a hole without collisions between molecules. This occurs if the diameter of the hole is considerably smaller than the mean free path of the molecules. According to Graham's law, the rate at which gases effuse is dependent on their molecular weight; gases with a lower molecular weight effuse more quickly than gases with a higher molecular weight. For two gases at the same temperature, and thus having the same kinetic energy, the root mean square molecular speed, of each gas can be found using the equation where is the Boltzmann constant. Thus, lighter molecules have a higher speed. This results in more molecules passing through the hole per unit time. This is why a balloon filled with low molecular weight hydrogen deflates faster than an equivalent balloon full of higher molecular weight oxygen.
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"effusion." Kamus.net. STANDS4 LLC, 2024. Web. 25 Apr. 2024. <https://www.kamus.net/english/effusion>.
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