Loschmidt number

Encyclopedia : L : LO : LOS : Loschmidt number

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In chemistry and physics, the Loschmidt number is the number density of an ideal gas at standard temperature and pressure,

[L = 2.687 \times 10^ \ \mathrm^ ] .

It is named after the Austrian chemist Johann Josef Loschmidt, who calculated, in 1865, the number of molecules of such a gas in one cubic centimeter.

It is also used as synonym for Avogadro's constant; this use is considered archaic in English language, while it is still current in other languages, e.g. in German scientific literature and textbooks.

 

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