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Fall05_Test2 - 1 PGE 312 FALL 2005 Physical and Chemical...

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1 PGE 312 - FALL 2005 Physical and Chemical Behavior of Petroleum Fluids I Test #2, 50 Minutes Closed Book Note: It will be in your best interest to attempt all 4 questions. Please budget your time accordingly. Problem 1 (20 points) Ninety one (91) milli moles of ethane and thirty nine (39) milli moles of normal heptane are charged into a PVT cell at T = 100 ° F and P = 500 psia. The equilibrium ratios (k- values) for the ethane and normal heptane at the given conditions are as follows: k 2 = 1.3388 k 7 = 0.0232 a. Calculate the milli moles of liquid in the cell. b. Calculate the composition of the liquid in the vessel in mole fractions. Please circle the answers you want me to grade.
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2 Problem 2 (40 points) Figure 1 shows the results of a flash calculation. Figure 1. Results of a flash calculation. 1 2 3 Gas composition(mole frac) 0.7768 0.1174 0.1058 m p np y y y y y y y � � � � � � = = = � � � � � � � � Amount of gas 43.4560 lb moles 0.5432 ?
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