SCIENCE|natural and applied sciences|physical sciences|chemistry
- eisleathadh Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- Effusion
- de
- Definition Ausströmen von Gasen aus einer sehr feinen Öffnung in einer dünnen Wand Reference "Thieme RÖMPP Online, Eintrag zu ""Diffusion"", Thieme, 2010, http://www.roempp.com/prod/ (24.08.2010)"
- effusion
- en
- Definition the flow of gas through holes which are sufficiently large for the velocity to be approximately proportional to the square root of the pressure difference Reference Multilingual Aeronautical Dictionary(AGARD,1980)
- Comment the molecules must flow without collisions between them. 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 (i.e., how many molecules pass through the hole per second) is dependent on their molecular weight; gases with a lower molecular weight effuse more quickly than gases with a higher molecular weight