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

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

  2. Internal energy! (Replies: 8)

Loading...