. 4. Given a compound has: A normal boiling point of 150F, A molecular weight of 50 lbm/Ib-mol, R=1.987 Btu/lb-mol PR (find R in same unit as Cp' first), An ideal gas heat capacity of Cp*=1 T/1200+ T2x10-6 BTU/Ibm:OR, with T representing the temperature in R, The change in internal energy for vaporization is 103.5 BTU/lbm, A constant heat capacity in the liquid phase of Cp=0.85 BTU/lbm: R, For liquid assume Cr=Cp The compound is initially at 175F. If the pressure is constant at P=1 atm throughout the process, and the specific internal energy of the compound is decreased by 150 BTU/lbm, what is the final temperature? (30 points)