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Thermal Physics

  1. Aug 13, 2014 #1
    When two gases are
    mixed, if they are to be in thermal equilibrium, they must have the
    same average molecular speed. Why or why not?
  2. jcsd
  3. Aug 13, 2014 #2

    Simon Bridge

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  4. Aug 13, 2014 #3


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    Actually, they have the same average molecular kinetic energy. If the two gases have different molecular weights, then then they won't have the same average speed; the more massive molecules will be moving slower than the lighter molecules.
  5. Aug 13, 2014 #4
    Thanks stevendaryl, I was thinking the same. Just wanted to confirm :)
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