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Homework Help: Kinetic Theory of Gases Problem

  1. Dec 17, 2004 #1
    ok, Im having trouble understanding exactly what this problem wants from me, its asking:

    At what temperature would the translational rms speed of hydrogen molecules be equal to that of oxygen molecules at 300K?

    and the answer it gives me is 19K... but I really have no idea where to even start at on this problem
  2. jcsd
  3. Dec 18, 2004 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Temperature is a measure of the average translational KE of the molecules in the gas. (They are directly proportional.) So how would the rms speed depend on temperature and mass?
  4. Dec 19, 2004 #3
    Try searching for some formula on Kinetic theory of gases!

    Once you get hold of the formula, it is very simple.

    (the formula is simple too)
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