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Thermal physics

  1. Dec 2, 2007 #1

    sun

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    [SOLVED] thermal physics

    1. The problem statement, all variables and given/known data
    a) What is the total random kinetic energy of all the molecules in one mole of neon at a temperature of 305 K? I got 3801.83J

    (b) With what speed would a mole of neon have to move so that the kinetic energy of the mass as a whole would be equal to the total random kinetic energy of its molecules?


    2. Relevant equations

    (1/2)mv^2=(3/2)kT
    v(rms)=sqrt(3kT/m)


    3. The attempt at a solution
    I'm not sure what to do in order to solve for part b. Not to sure if i'm even looking at the correct equations. Any suggestions?

    Thanks
     
    Last edited: Dec 2, 2007
  2. jcsd
  3. Dec 3, 2007 #2

    sun

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    any suggestions. I would love the help and greatly appreciate it. :)
     
  4. Dec 3, 2007 #3

    sun

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    I figured it out:

    KE=1/2(mv^2)

    KE=3801.83
    m=20.2*10^-3
     
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