Test1Fall03 (16) - 1 PGE 312 FALL 2003 Physical and...

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1 PGE 312 - FALL 2003 Physical and Chemical Behavior of Petroleum Fluids I Test #1, 50 Minutes Closed Book Note: It will be in your best interest to attempt all the questions. Please budget your time accordingly. 1. ( 20 points ) Figure 1 shows the Temperature-Composition phase diagram for all possible binary mixtures of two hydrocarbons A and B at a constant pressure of 300 psia. One hundred pound moles (100 lb moles) of a binary mixture consisting of 60 mole % of Component A and 40 mole % of Component B is confined in a sealed vessel maintained at a constant pressure of 300 psia and a constant temperature of 250 F. ˚ a. Determine the composition of the gas in the vessel in mole fractions. You must give two numbers to adequately describe the composition of a binary mixture. b. Calculate the pound moles of the liquid in the vessel. c. Which is the more volatile component and why? You must give the correct reason for your choice to get any credit. There will be no credit for a lucky guess.
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