Dear sir

You can calcluate each of them seperately and after that you can combine it with x*s1+(1-x)s2

Regards

M.A.Ehyaei

Dear Mr. Aliehyaei

I have pressure, temperature and mass fraction of Ammonia in a specific point and I want to calculate the enthalpy in that point. The problem is that when I give these values to Refprop it says that 2-phase state did not converge. So I can't calculate them separately. When I give these values to EES it gives me a negative enthalpy. I know it is because of the reference point that EES assumed for zero enthaply, but it messes with my calculations and because of that, I want to calculate it with Refprop.

https://www.sciencedirect.com/search?qs=mixture%20thermodynamic%20properties%20in%202-phase%20state%20in%20Refprop&show=25&sortBy=relevance