Composition of atmospheric air and mean thermal speed

02 Jul 2021 - tsp
Last update 02 Jul 2021
Reading time 1 min

Gas type Partial pressure (mbar) Mean speed ($\frac{m}{s}$) Mean molecule mass ($\frac{kg}{mol}$) at 20 Celsius
Nitrogen $N_2$ $791$ 471 28
Oxygen $O_2$ $212$ 440 29
Argon $Ar$ $9.46$ 394 40
Water vapor ($H_2O$) $\leq 23$ 587 18
Carbon dioxide ($CO_2$) $0.32$ 375 44
Neon ($Ne$) $1.8 * 10^{-2}$ 557 20
Helium ($He$) $5.3 * 10^{-3}$ 1245 4
Krypton ($Kr$) $1.1 * 10^{-3}$ 272 84
Hydrogen ($H_2$) $5.1 * 10^{-4}$ 1761 2
Xenon ($Xe$) $8.7 * 10^{-5}$ 217 131
Ozone ($O_3$) $2.0 * 10^{-5}$ 360 48

This article is tagged: Atmosphere, Partial pressure, Thermal speed, Vacuum


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Dipl.-Ing. Thomas Spielauer, Wien (webcomplains389t48957@tspi.at)

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