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Homework Help: Leaking air?

  1. Apr 28, 2009 #1
    leaking air??

    1. The problem statement, all variables and given/known data

    Suppose we make a circular hole 3 millimeter in diameter in a balloon. Calculate the initial rate at which oxygen escapes through the hole (at 0° C), in number of oxygen atoms leaving the balloon per second.

    2. Relevant equations

    i used 1/4 nAv where n = number of molecules / Volume

    i did not know the n or the v for this problem so did not attempt it completely :(
  2. jcsd
  3. Apr 28, 2009 #2


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    Homework Helper

    Re: leaking air??

    Isn't there any dependence on the pressure differential across the leak hole?
  4. Apr 28, 2009 #3
    Re: leaking air??

    I am having trouble with this problem as well. Using that equation I only know that A=(pi*3^2) but don't know how to get v or how to solve for the rate of leakage (atoms per second). Any help would be appreciated.
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