FinalSpring07 - 1 PGE 312 SPRING 2007 Physical and Chemical...

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1 PGE 312 - SPRING 2007 Physical and Chemical Behavior of Petroleum Fluids I Final Examination, 3 Hours Closed Book & Notes It will be in your best interest to attempt all the questions. Please budget your time accordingly. Problem 1 (15 points) Determine the density of the following hydrocarbon liquid at a temperature of 180 ° F and the bubble point pressure of 4000 psia. The liquid specific gravities of the components at 60 ° F and 14.7 psia are given in Table 1 along with other pertinent information. Table 1 Component Liquid Composition (mole fraction) Molecular Weight (lbmass/lb mole) Component Specific Gravity n-Pentane 0.10 72 0.6311 n-Hexane 0.25 86 0.6638 Heptane + 0.65 218 0.8515 1.00
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4 Problem 2 (16 points) Two thousand pound moles (2000 lb moles) of a binary mixture of methane and octane is confined in a vessel in which the volume of the mixture and the pressure in the vessel can be varied. The total composition of the mixture and the K-values (equilibrium ratios) at various pressures at a constant temperature of interest are given below: P = 2000 psia P = 1000 psia P = 100 psia Component Mole % K-Value K-Value K-Value Methane 40 2.400 4.100 35.000 Octane 60 0.040 0.023 0.062 The molecular weights of methane and octane are 16 and 114 lbm/lb mole, respectively.
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