High pressure gases specific heat

[stefaan]

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

 

[Q_Goest]

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