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Diatomic ideal Gas

  1. Mar 31, 2013 #1
    I try to understand a cycle process with an diatomic ideal Gas.

    Is it possiblie to use the ideal gas law:


    for the diatomic gas?

    I thought it is just for monoatomic.

    Abby :redface:
  2. jcsd
  3. Mar 31, 2013 #2


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    Staff: Mentor

    Yes, an ideal gas need not be monatomic.
  4. Mar 31, 2013 #3

    Philip Wood

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    Gold Member

    DrClaude is right, of course. Almost all the molecules (O2 and N2) in air are diatomic, and at very low densities air obeys pV = nRT more and more closely.
    Last edited: Apr 1, 2013
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