1) (45 points) A hydrocarbon (HC) mixture containing 35.0 mole% n-butane and the balance iso- butane at 10C enters a heat exchanger at a rate of 24.5 kmol/hr and a pressure of 5 bar, which is high enough for the entering mixture to be a liquid. The exchanger has been designed to heat and vaporize the liquid and heat the vapor mixture to 180C. The heating fluid (HF) used is a high molecular weight liquid with a constant heat capacity Cp = 2.62 kJ/(kg C). It enters the exchanger at 215C and flows countercurrent to the hydrocarbon mixture as shown below. 15C, 1 Murray Heating Huld Side TCP1 har Ft Okwt butan/o-butane 10C. Par mein - 245 mally) samlet as y as a to Wanel A schematic of this process is shown below. Please only use the variables labeled on the flow chart, where HF = Heating fluid and HC = Hydrocarbon mixture (iso-but-but mix). c) (9 pts) Using the reference states below, complete the enthalpy expressions as appropriate assuming that your heat capacities are available for both the liquid and gas states of the butanes. You do not need to evaluate the specific enthalpies. Just show how you would calculate them! Reference States: Isobutane (1, 10C, 5 bar); n-butane (8,10C, 5 bar); Species nal (kmol "/hr) Anck /kmol roueckmol/hr) Howeck Isobutane (1) A = Isobutane (9) Ag = n-Butane (0) A2 = n-Butane () A4 = kkmel Specific Enthalpy Expression (kJ/mol) -10C R - Super Cu-buery(7) 10C AZ R A