2.51 Consider a mixture of 25% ammonia, the rest nitrogen and hydrogen in a 1:3 ratio. The gas is at 270 atm and 550 K. Use Excel (or MATLAB) to compute the specific volume using (a) ideal gas law (b) Redlich-Kwong equation of state (c) Redlich-Kwong-Soave equation of state. Where did you get the data you needed? How do the three answers compare? Is the gas ideal or not? Comment on the reasons the RKS equation might be expected to be better. TABLE 2.1 Equations of State for Pure Components h Model EOS Ideal gas pV = nRT RT R-T RT van der Waal p= a=0.42188 b=0.125 8-h N Pe RT RT Redlich-Kwong p a-0.42748( a b 0.08664 i-b (+b) P RT RK-Soave P- a=0.42748 a b 0.08664 8-6 0(+b) 0.375 0.333 a=[1+m(1-7)] m = 0.480 0.333 +1.574w -0.176 RT Peng-Robinson p= a=0.45724 -b (+b)+b(-b) () a b 0.07780 80 (7) a = (1+m (1-795)] m-0.37464 0.307 +1.542260) -0.269922