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Old   October 4, 2000, 06:10
Default Cp of Argon
  #1
Bivan
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Anyone can tell me : 1.How much is enthalpy of Argon and Nitrogen at 1000K? 2.And how to calculate enthalpy of Ar and N2 at 20000K(Cp has been known) ?
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Old   October 5, 2000, 05:30
Default Re: Cp of Argon
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Jin Wook LEE
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Enthalpy is defined as :

delta h = Int (from Tref to T) Cp dT. So, it is very easy for you to calculate the enthalpy of Ar and N2 because you already know Cp.

Sincerely, Jinwook

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Old   October 5, 2000, 17:08
Default Re: Cp of Argon
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Aquaman
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Jin LEE was right, but note also that in order to answer your question you need to know at what pressure your system is. So again....

Cp = dh/dT (For a constant pressure!!!!)

Have Fun...
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Old   October 6, 2000, 04:25
Default Re: Cp of Argon
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Bivan
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How much is enthalpy of Argon and Nitrogen at 1000K?
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Old   October 6, 2000, 10:13
Default Re: Cp of Argon
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Phil
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Once I saw a book with all important properties of argon, which I think must also exist for Nitrogen. I think it is from the IUPAC. Unfortunately I don't know more but I am quiet sure that it was published by IUPAC so perhaps it will be helpful to look under www.iupac.org/

Good luck

Philipp
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Old   October 6, 2000, 12:37
Default Re: Cp of Argon
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Aquaman
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I found this link. I didn't go very much further than this but if you follow the information here it should lead you to a program which will calculate everything for you... Lucky!

http://www.lerc.nasa.gov/WWW/DSA/wri...ies/fluid.html
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