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De broglie wavelength for helium and distance between atoms

  1. Oct 6, 2015 #1
    1. The problem statement, all variables and given/known data
    Consider a balloon filled with helium gas at room temperature (T = 294 K) and atmospheric pressure. Calculate (a) the average de Broglie wavelength of the helium atoms and (b) the average distance between atoms under these conditions. The average kinetic energy of an atom is equal to (3/2)kT, where k is the Boltzmann constant. (c) Can the atoms be treated as particles under these conditions?

    2. Relevant equations

    PV=NRT

    mv=h/λ

    v=sqrt(2KE/m)



    3. The attempt at a solution

    no idea where to start
     
  2. jcsd
  3. Oct 6, 2015 #2

    BvU

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    Science Advisor
    Homework Helper
    Gold Member

    Hello,

    Well, you could start with expanding on your relevant equations: what are the variables/constants that feature in them, how do they relate to the given information in the problem statement. See if you are still missing something, etc. Elementary problem solving steps.
     
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