Helmholtz: Cpo(Ideal Gas)
Cpo/R = 1 + t - {åai
×ni
×(ni - 1)×
tni}(ni
¹ 0 or 1)
+ åbi
×(ci
×
t)2
×exp(ci
×
t) / {exp(ci
×
t) - 1}2;
where t = Tc/T, Tc = the critical temperature, and the summations are from i = 1 to nTerms.
The example is for fitted heat capacities in the ideal-gas state at p = 100 kPa for 2-methylpyrrole.