# HW_2 - zpPGE 312-SPRING 2008 Physical and Chemical Behavior...

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zpPGE 312-SPRING 2008 Physical and Chemical Behavior of Petroleum Fluids I Homework 2 Problem 2-1 . Normally, we neglect the pressure of the liquid. Therefore, P=17 Psia for 2-methylpentane at 150 , from Figure 2.8 in text book. Problem 2-5. Matching plots above Process Description From 1-2 Phase change from gas to liquid as the vapor pressure curve is crossed. From 2-3 Smooth transition from liquid to gas as we move above the critical point. From 3-4 Gaseous phase. From 4-1 Gaseous phase.

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Problem 2-6 . y = 795913.96 e -3618.81 x R² = 1.00 100 1000 0.00205 0.0021 0.00215 0.0022 0.00225 0.0023 0.00235 0.0024 Vapor pressure, psia Temperature -1 1/T, R -1 40 (40 460) 500 o o T F R = = + = o R From the graph, ln 3618.81 13.587 y x = − + 1 3618.81 13.587 499.67 1 1 ln 3618.81 13.587 572.15 V V V L P C R T T P e psia + = − + = − + = = or 1 1 2 39.1 420.9 , 147.0 40 500 o o V o o T F R P T F R = − = = = = 2 1 1 2 1 1 3618.81 ln147.00 420.9 500 2 1 1 ln ln 572.83 V V V V L P P R T T P e psi + = = = a