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Homework Help: Thermodynamics of gases

  1. Feb 10, 2004 #1
    need some explaination of these.

    a gas feels cold when it escapes through a small hole of a closed cylinder at high pressure. Explain this phenomenon based on the first law of thermodynamics.
    will the escaping gas above be cold if allowed o excape into a vacuum??
  2. jcsd
  3. Feb 10, 2004 #2


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    Homework Helper

    Probably you will use the ideal gas law as well. Please tell us what you think the first law of thermo is (with definitions/interpretations).
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