Ek = 1/2 mass x speed2
R = 8.314 joule/mol K
Why do equal numbers of molecules of two different gases, such
as O2 and H2, occupy the same volume (c.f. standard molar volume)?
=
root-mean-square speed; a molecule moving
at this speed has the average kinetic energy
At constant T, two gases possess the same kinetic energy; thus,
the heavier gas must be moving more slowly.
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