exam2_2002_key

# Exam2_2002_key - Printed Name Problem 1 2 3 4 Total Score ChE 330 Exam 2 Winter 2002 Open Book Course Notes Homework Solutions and Course Text Only

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Printed Name: Problem Score 1 2 3 4 Total ChE 330 Exam 2: Winter 2002 Open Book Course Notes, Homework Solutions, and Course Text Only! There are 9 pages including the cover for this exam Write and Sign the Honor Code Signature: 1

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Initials: 2 1. Short Answers (25 pts) a) (5 pts) Where is the fugacity larger point A or point B? Why? (This plot shows an isotherm. On that isotherm P sat r = 0 . 7) 012345 0.4 0.5 0.6 0.7 0.8 0.9 1 P_r V_r A B Psat At point A, at P sat the fugacities are equal. A is higher that f sat and and B is lower than f sat . Fugacity always increases with pressure. See f versus P plot on Chapter 8 review sheet. Grading: +3 for right answer wrong reason b) (5 pts) I demand an HP plot of Freon-11. Does your textbook have enough informa- tion in its tables for you to generate one? If yes, explain what information you would use. If no, explain what extra information you need. Yes, To use a Cubic equation of state and departure functions I need critical parameters acentric factor and ideal gas heat capacity. They are all in the book. This is direclty from PS 5, make an HP chart. Grading: +2 for critical temp and pressure, +1 for ω , +2 for C ig p
Initials: 3 c) (5 pts) How would you use the matlab function PhiHat PengRobinson to check if a mixture were an Ideal Solution? ( PhiHat PengRobinson returns the value of ˆ φ i ( T, P, z ) for each component in a mixture). In an ideal solution ˆ f is i = y i f i f i = φ i P ˆ f is i = y i φ i P In any mixture ˆ f is i = y i ˆ φ i P So a material is an ideal solution if φ i = ˆ φ i I can get φ i by PhiHat PengRobinson for a pure component. This was on old exam. Grading +3 for φ i = ˆ φ i , +1 for a method to calculate φ i , +2 for using PhiHat PengRobinson on z 1 = 1 , z 2 = 0 to get φ 1 d) (5 pts) A glass of wine is in this room where the total pressure is 1 atmosphere and the temperature is 25C. The bubble pressure calculation for the liquid composition of

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## This note was uploaded on 04/21/2008 for the course CHE 330 taught by Professor N/a during the Winter '02 term at University of Michigan.

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Exam2_2002_key - Printed Name Problem 1 2 3 4 Total Score ChE 330 Exam 2 Winter 2002 Open Book Course Notes Homework Solutions and Course Text Only

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