am(T) = (sumproduct of) xi*xj*(a(T,i)*a(T,j))^(1/2)
a(T) = ac(i)*(1+k*(1-(T/Tc(i))^(1/2))^2
k = 0.37464+1.54226*om(i) - 0.26992*(om(i))^2
ac, om, and Tc are component specific, therefore a(T) is different for each component and am(T) is the sumproduct of the following equation, where i, j...
I know the equation for calculating the enthalpy of a mixture using Peng-Robinson. However, there is a derivative, d(am(T))/dT,
where am(T) = xi*xj*(a(T,i)*a(T,j))^(1/2)
a(T) = ac*(1+k*(1-(T/Tc)^(1/2))^2
k = 0.37464+1.54226*om - 0.26992*om^2
that I am having a difficult time...
