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Specific enthalpy of air

  1. Apr 11, 2006 #1
    I'm sure this is a really dumb question, but how do you find the specific enthalopy of air at a given temp and pressure? I Have been using my thermo tables for everything but I do not have tables for air. The only tables for air that I see list the properties at .1 Mpa and I need it at 200, and 90kPa. Do I use Cp?
     
  2. jcsd
  3. Apr 11, 2006 #2
    Enthalpy for Ideal gases are given in your tables as functions of temperature in Kelvin.

    You can use cp when the temperature range is small as an approximation.
     
  4. Apr 11, 2006 #3
    ok, thanks
     
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