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Ideal or Real Gas?

  1. Oct 3, 2007 #1
    If a sample of air had high pressure and high temperature, would it be a real or ideal gas?
  2. jcsd
  3. Oct 3, 2007 #2


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    If it's air it is a real gas.
    Generally at higher pressures gases become less 'real' as the molecules are closer together they interact - which ideal gases don't do.
    In other words at low pressures the ideal gas laws are a better approximation.

    Similairly at high temperatures the gas is moving around more so most of it's energy is kinetic rather than in any chemical properties of the molecules so it behaves more like an ideal gas.
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