King Saud University Chemical Engineering Department Cai 205: Thermodynamics Tim
ID: 475920 • Letter: K
Question
King Saud University Chemical Engineering Department Cai 205: Thermodynamics Time allowed: 1:15 Given by Dr. M. K. Hadj-Kali 03/07/1436 ID: Name: Solve problems (I and II) er (I and III) calculate the compressibility factor and the molar volume for ethane at 50 C and 15 bar using tur i, The Lee and Kesler correlation marks) i. The truncated virial equati on z-1 with B .1567 cm mol a marks) 2. Estimate the volume occupied by 10 kg of ethane at socand 15 bar. G marks) Propane gas is burned completely with 30% excess air at approximately atmospheric pressure. B the propane and the air enter the fumace at 25 C and the flue gases leave the farmace rt 130e"c. Estimate the standard beat ofcombustion of propane at 25 Marks) Calculate the number of moles of all components present in the exit stream (2 Marks) Per mole propane, how much beat is lost from the fumace?G Marks) What is the maximum temperature that can be reached by this reaction? (2 Mark) An equimolar mixture of nitrogen and acetylene enters a steady flow reactor at 2 c a atmospheric pressure. The only reaction occurring is Na (g) C1H2 HCN (g) The product gases leave the reactor at 600 c and contain 35 mol% HCN. How much heat is supplied to the reactor per mole of acetylene? (0 Marks)Explanation / Answer
1.Tc and Pc are the critical temperature and pressure.
At a reduced value of Tr = T/Tc and Pr = P/Pc.find the values of Z0 and Z1 and obtain the value of accentric factor from the text book appendix-E.
Z = Z0 + Z1
determine the volume using Z in th above,
v = ZRT/P = cc/mol,
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ii)
Use the value of V from the above, use the value of second virial coefficient B,
find Z using the truncated equation
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