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Density computation for high temperature, low pressure argon

  1. Feb 17, 2016 #1
    I am trying to compute the density of argon given the following conditions:
    T = 7000 K
    P = 21331 Pa

    For typical gases, I do not believe the ideal gas law would hold for such a high temp&low pressure regime, but since Argon is largely non-reactive, do you guys think using the ideal gas law would be appropriate here to compute the density?
     
  2. jcsd
  3. Feb 17, 2016 #2

    BvU

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    So far above http://www.nist.gov/data/PDFfiles/jpcrd363.pdf [Broken] and so far below pc the ideal gas law is perfect.
     
    Last edited by a moderator: May 7, 2017
  4. Feb 17, 2016 #3
    Hmm thank you for the post. Is this largely become Ar is an atom?

    For example, I cannot use the ideal gas law if it was instead nitrogen gas (N2) since it will dissociate before this temperature, but I believe the temperature is above ##T_c## and the pressure is below ##P_c##.
     
    Last edited by a moderator: May 7, 2017
  5. Feb 17, 2016 #4

    BvU

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    You can use the ideal gas law for N under those (dissociated) conditions.
     
  6. Feb 17, 2016 #5
    But not for ##N_2## correct?
     
  7. Feb 17, 2016 #6

    BvU

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    If there is no http://www.nist.gov/data/PDFfiles/jpcrd39.pdf [Broken]http://www.nist.gov/data/PDFfiles/jpcrd39.pdf [Broken] then you can't use the ideal gas law, correct :smile: !
     
    Last edited by a moderator: May 7, 2017
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