High pressure gases specific heat

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SUMMARY

This discussion focuses on calculating the reaction heat in an ammonia converter, specifically requiring the specific heats of nitrogen (N2), ammonia (NH3), argon (Ar), and methane (CH4) at 500°C and 200 bar. The NIST website was referenced for specific heat values, although it does not provide data for ammonia at the specified pressure. The specific heat values obtained are: Nitrogen (Cv: 0.1977, Cp: 0.2738), Ammonia (Cv: 0.6080, Cp: 0.7906), Argon (Cv: 0.07550, Cp: 0.1314), and Methane (Cv: 0.8018, Cp: 0.9490).

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stefaan
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I want to calculate the reaction heat in a ammonia convertor but I need some
specific heats of N2,NH3,Ar and CH4 at 500°C and 200bar. I could find data at 500°C but not at that pressure.


thanks Stefaan
 
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Hi Stefaan,
I was going to suggest the NIST website but I see they don't go up that high in pressure for ammonia at least.
http://webbook.nist.gov/chemistry/fluid/

Values below are in Btu/lbm-F.

Fluid / Cv / Cp
Nitrogen / .1977 / .2738
Ammonia / .6080 / .7906
Argon / .07550 / .1314
CH4 / .8018 / .9490
 

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