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!

Internal energy equals to average kinectic energy ?

  1. Dec 27, 2012 #1
    For ideal gas , can I assume Cv dT = nkT (3/2)
    , thank you
     
  2. jcsd
  3. Dec 28, 2012 #2

    Andrew Mason

    User Avatar
    Science Advisor
    Homework Helper

    No. Molar heat capacity, Cv = 3R/2 only for ideal monatomic gases. You are also mixing temperature change with temperature here.

    Using molar heat capacity 3R/2 for a monatomic ideal gas:

    [itex]\int_{Ti}^{Tf} nC_vdT = \frac{3}{2}nR(T_f - T_i) = \frac{3}{2}nR\Delta T = \frac{3}{2}Nk\Delta T[/itex]



    AM
     
  4. Dec 29, 2012 #3
    Thanks for compact explanation.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Internal energy equals to average kinectic energy ?
  1. Internal Energy! (Replies: 4)

  2. Internal energy! (Replies: 8)

Loading...