specific heat=f(temperature)-how to do???

Micha

Hello,

I would like to model the specific heat as a function of temperature. Therefore I calculated the specific heat of my gas-mixture at different points with an other programm, calculated the quotient Cp/R according to the manual and also fitted a polynom to these values (4th degree). So I got 5 polynomial coefficients.

I tried to define the polynom with command popcp (without the n+1 coefficient), but Unfortunately PROSTAR calculates the wrong values for the specific heat...!

Probably the reason is, that I have to define another coefficient for enthalpy (-->methology equation 1-41 or star-commands-help: popcp). Why do I need this one? Where can I get it from?

What do I have to do to define the polynom for cp=f(t) correctly?

Thanks for every advice!

Micha