ChE 381
Fall 2012
Homework #1, due Wed August 29th
Updated Tuesday 8/21/12 10:30am
This assignment covers chapters 2 and 4.
Individual:
1. A well-insulated steel tank (5 kg) filled with 40 kg of 200C water is used to cool a 2-kg quartz slug that
is initia
ChE 381 Exam 1
February 7, 2011
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ChE 381
Homework #9
Due at the beginning of class 11/14/12
Office Hours: Tues 1-2, Wed 9-10. Out of town and largely inaccessible on Thurs; limited email access.
GROUP:
1. Given the following VLE data for acetone(1),
methanol(2) at 550C,
(a) Generate a Px
ChE 381 Extra Credit
The 2 books I compared was Essential Thermodynamics by Athanassios Z.
Panagiotopoulos (2011) and my current thermodynamics text book Introduction to
Chemical Engineering Thermodynamics by J.M Smith, H.C Van Ness and M.M.Abbott
(2001).
ChE 381
Homework #7
Due at the beginning of class 10/24/12
GROUP:
1. Given the following mixtures of ethane, propane, isobutane, isopentane:
(a) A liquid that is 10% ethane, 20% propane, 30% isobutane, 40% isopentane at 600C. Find the
bubble-point pressur
ChE 381
Homework #6
Due at the beginning of class 10/17/12
INDIVIDUAL:
1. Find a paper in the scientific literature describing the use of an entrainer to improve VLE-based
separation. Google scholar and ISI Web of Science are both good search engines. Rep
ChE 381
Homework #6
Due at the beginning of class 10/17/12
GROUP:
1. Generate a Pxy diagram for a mixture of methanol (MeOH) and methyl acetate (MA) at 318.15K and
a Txy diagram at 101.33kPa (a) assuming ideal behavior and (b) using modified Raoults Law,
ChE 381
Homework #5
Due 10/3/12
GROUP:
1. Syngas is produced by biomass gasification.
http:/www.iowastatedaily.com/news/article_1066b918-539c-566e-8404-259499f71ebe.html
http:/www.iprt.iastate.edu/news/2011/cset_syngas.html
http:/www.biorenew.iastate.edu/
ChE 381
Homework #4
Due 9/26/12
Group
1. Superheated steam at 400psia and 5000F is expanded in a well-insulated turbine with an outlet
pressure of 100psia, surrounding temperature 950F. Assuming that the process is mechanically
reversible, find the expect
ChE 381 Exam 2
February 28, 2011
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ChE 381 Exam 4
May 4, 2011
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Lecture 25: Mon Oct 29th, 2012
Review for Exam 3
Points for review:
- VLE: Modified Raoults Law, DePriester charts
- Derivation of chemical potential m, application to multi-phase equilibria
- Definition of partial molar properties, application to ideal g
Review for Exam 4
Standard exam format, but twice the time. I expect you to be able to
provide more detail, look up parameters on your own. Bring your textbook!
Old exams posted; note that VLLE was not covered this semester
Where did we leave off with Uni
ChE 381 Exam 4
December 14, 2011
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ChE 381 Exam 4
May 4, 2011
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ChE 381 Exam 3
November 9, 2011
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ChE 381 Exam 3
April 1, 2011
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have neither given nor received unauthorized aid on this examination.
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ChE 381 Exam 2
October 11, 2011
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ChE 381 Exam 1
September 16, 2011
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Si
ChE 381 Fall 2012 Unit 2 Study Guide
You should be prepared to:
1. Derive the four fundamental property equations, show how they are used to derive the
four Maxwell Relations and explain how these equations and relations are useful.
2. Calculate residual