1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Thermodynamics- rms translational kinetic energy

  1. Sep 5, 2013 #1
    1. The problem statement, all variables and given/known data
    A container having a volume of 1m^3 holds 5 moles of helium gas at 50C. If the helium behaves like an ideal gas, the rms translational kinetic energy is?

    2. Relevant equations
    Total E= 3/2 nRT

    3. The attempt at a solution
    I tried solving this question using this equation, but I did not get the right answer.
    The correct answer is 6.7 x 10^-21 J
  2. jcsd
  3. Sep 6, 2013 #2


    User Avatar
    Homework Helper

    Welcome to PF!

    Please, show your work.

  4. Sep 6, 2013 #3
    Total Ek= 3/2 nRT
    = 3/2 x 5 x 8.314 x 323
    = 20140.7J, but this answer is wrong
  5. Sep 6, 2013 #4


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    The problem is asking for the energy per atom.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted