ChE 344
Week 2
Problem Set 1
Due Tuesday, January 15, 2013 (Lecture 2)
Individual Assignment
Please absolutely no talking during lecture. If you need to speak to someone there will be
sufficient opportunities during breaks.
1. PLQ2 (PreLecture 2 Quiz) - What is a Levenspiel Plot (Ch. 2)? Submit your answer to
CTools before class.
2. P1-1A. Part (a) Submit your “brief” paragraph by e-mail to sfogler@umich.edu. After subject,
type: Problem Set 1: Course goals.
3. P1-2A (omit part (d))
4. P1-5A - ICM Kinetics Challenge 1. The module can be installed from the DVD or it can be
downloaded from the following web sites: http://www.essentialsofcre.com/ or
http://www.umich.edu/~essen/. For this first assignment, send your performance number to
cdpet@umich.edu.
5. Problem P1-6A
6. P 1-12B-Use Polymath 6.1 (available on CAEN computers).
There is a Polymath Tutorial on the web site in the summary notes for Chapter 1. To access
the tutorial start from the home page and then:
1. Click on Living Examples Problems
2. Click on the Polymath link in the second paragraph
3. Click on here for Tutorials
4. Click on Ordinary Differential Equation Solver for part (a) and Nonlinear Equation Solver for (b)
7. P2-3A (a) Chapter 2: Record your learning style according to the Solomon/Felder inventory at
http://www.engr.ncsu.edu/learningstyles/ilsweb.html
A. Global/Sequential ________
B. Active/Reflective ________
C. Visual/Verbal
________
D. Sensing/Intuitive ________
E. Read Appendix H.2 in the textbook and Suggest ways for each (A through D) to use the
DVD and web to facilitate your learning styles. Also go to the links at the end of the
Chapter 2 Summary Notes. Go to
http://www.engin.umich.edu/~cre/asyLearn/itresources.htm
8. Go to the CRE Essentials web home page (www.umich.edu/~essen) click on “typos” and
then correct on the typos in chapters 1 and 2.
ProblemSets.docx
ChE 344
Week 2
Problem Set 2
Due Thursday, January 17, 2013 (Lecture 3)
Individual Assignment
1. PLQ3 - Define each of the terms in the Arrhenius Equation (Ch. 3) and then post using
CTools. Also email your answer to the Teaching Assistant (GSI) before class.
2. P2-4A ICG Staging. Send your performance number to cdpet@umich.edu.
3. P2-10D
4. P2-13A
5. Spend 20 minutes familiarizing yourself with the website, go through the summary notes for
chapter 1, look at the self-test and examples. Be sure to view the pictures of real reactors
shown in the Professional Reference in the DVD. Note: These pictures CAN ONLY be
viewed on the DVD.
6. Read advice on How to succeed in CRE (from previous classes on the web site) at
http://www.umich.edu/~essen/html/3442012/guidelines/344advice.html
7. Read through http://www.umich.edu/~essen/html/3442012/guidelines.html, print out the
Memorandum of Understanding and hand it in.
8. Register your i>clicker on the ChE 344 CTools web site. To read about the use of i>clickers
in the classroom see http://www.cwsei.ubc.ca/resources/clickers.htm and
http://www.sciencemag.org/content/323/5910/122.full.
9. Go to the CRE Essentials web home page (www.umich.edu/~essen) click on “typos” and
then connect on the typos in chapters 1 and 2
ProblemSets.docx
ChE 344
Week 3
Problem Set 3
Due Tuesday, January 22, 2013 (Lecture 4)
Individual Assignment
1. PLQ4 - Each group member is to individually define θi, θA, θB, and δ. Submit to CTools
before class
Group Assignment
1. P2-11B
2. P3-3B and then write a paragraph describing activation energy, its origin, and how it affects
chemical reaction rates.
3. P3-6B
4. P3-10A
5. P3-11A
6. As a group explain what each member of the group did in the active learning role, i.e.
manager, recorder, checker, and critic.
7. Go to the website: http://www.chem.uci.edu/undergraduate/applets/sim/simulation.htm.
Note: make sure your browser supports Java. When you access the website, you should see
something very similar to this:
ProblemSets.docx
The reaction is
(A + B ↔ C + D)
Red + Yellow ↔ Green + Blue
In the upper left-hand corner of the screen should be a box, which is the “simulation control
panel”. The numbers in the boxes next to red/yellow/green/blue represent the initial number
of molecules (i.e. initial concentration or number density) present in the simulation. The
values kf and kr are the forward and reverse reaction rate constants respectively. These are
expressed as a probability between 0 and 1 that a collision between reactants will result in a
reaction. The “Stripchart ON” button allows you to track changes in the number of molecules
over time. Detailed instructions for operating the simulation are available by clicking on the
link displayed above the graphic.
(a) Run a simulation with kf = kr, and beginning with equal numbers of red and yellow balls.
Track the changes in numbers of molecules using the stripchart. What is observed? Now
run the simulation again in the cases when kf > kr and kf < kr. How do these simulations
differ from the original case?
(b) How does the time to reach equilibrium change when you increase the number of red and
yellow balls? Why?
(c) How does the time to reach equilibrium change when kf and kr are increased? Why?
(d) Once equilibrium is reached are reactions taking place? What does this result say about
chemical equilibrium?
(e) Describe what you learned from this simulation.
ProblemSets.docx
ChE 344
Week 3
Problem Set 4
Due Thursday, January 24, 2013 (Lecture 5)
Individual Assignment
1. PLQ5 - Define ε, FT0, CT0 and explain how the volumetric flow rates for a gas system varies
with concentration, temperature and pressure. Submit to CTools before class
ProblemSets.docx
ChE 344
Problem Set 5
Due Tuesday, January 29, 2013 (Lecture 6)
Individual Assignment
1. PLQ6 – Describe and explain
(a) the 5 steps (with sub steps) of the CRE algorithm.
(b) the significance of the Figure on p. 190.
Submit to CTools before class.
Group Assignment
1. P4-2A (a,b)
2. P4-3A ICG Kinetic Challenge II. Individual. Email performance number to cdpet@umich.edu.
3. P4-5A (parts b,c, and d)
4. P4-9B (omit part (a))
5. P4-11A
ProblemSets.docx
ChE 344
Week 4
Problem Set 6
Due Thursday, January 31, 2013 (Lecture 7)
Individual Assignment
1. PLQ7 - What are Problems 5-16B, 5-17B, and 5-18B asking you to find? What is the Ergun
Equation? Submit to CTools before class.
ProblemSets.docx
ChE 344
Week 5
Problem Set 7
Due Tuesday, February 5, 2013 (Lecture 8)
Individual Assignment
1. PLQ8 - Submit the answers to the following questions to CTools before 9:10 am. Pressure
Drop (Review of ChE 341) Also see pages 169-174.
(a) Define φ, Dp, β0, ρ, G, and α.
(b) What is α and on what variables does it depend?
2. P5-8A omit Parts (d) and (e)
3. P5-12A (a) and (b)
4. P5-16B (Clean your desk and try to work this California Professional Engineering Exam
Problem in 30 minutes). You might want to have a table of integrals handy or use
Appendix A.
ProblemSets.docx
ChE 344
Week 5
Problem Set 8
Due Thursday, February 7, 2013 (Lecture 9)
Individual Assignment
1. PLQ9 - What is the parameter a? What is RB and what parameters does is depend upon?
2. ICG - Mystery Theater. Email your performance number to morabitm@umich.edu.
3. Finish In Class Problem 6, P5-26 (parts e and f). If you finished this in class, there is no need
to do it over.
ProblemSets.docx
ChE 344
Week 6
Problem Set 9
Due Tuesday, February 12, 2013 (Lecture 10)
Individual Assignment
1. PLQ 10 - What is the equation for the volume V in a semi-batch reactor? Submit to CTools.
Group Assignment
1. P5-2A (a) and (f)
2. P5-5B (a) and (c)
3. P5-6A
4. P5-24B Part (a), (b), (c) and (f)
5. P5-25A
6. Continuation of In Class Problem 7, if necessary
ProblemSets.docx
ChE 344
Week 6
Problem Set 10
Due Thursday February 14, 2013 (Lecture 11)
Individual Assignment
1. PLQ11- What is nonlinear regression and how do you use Polymath to carry it out? Submit
your answer to CTools
2. P6-2B (part b only)
3. P6-3B Tic Tac. Email your performance number to morabitm@umich.edu.
4. Start Problem Set 11 due Tuesday.
ProblemSets.docx
ChE 344
Week 7
Problem Set 11
Due Tuesday, February 19, 2013 (Lecture 12)
Individual Assignment
dC
+ k2C = C0 e-k1t At t = 0, C = 0. [Hint:
dt
See summary notes on the integrating factor and Appendix A.]
1. PLQ 12 -What is the solution to the following ODE
Group Assignment
1. P6-8B (omit (d))
2. P6-11B Parts (a) and (b) only
3. P6-13C
4. P7-6A (omit (c))
5. P7-15B
6. If you did not finish In Class Problem 10, then continue and finish part (c)
The irreversible
liquid phase reaction
A→B+C
is carried out in a batch reactor. The following data were collected during the course of the
reaction.
t (min)
CA
0.0
2.00
0.5
1.63
1.0
1.41
2.0
1.15
3.0
1.0
4.0
0.89
Determine the order of reaction and the specific reaction rate using two methods to
differentiate your data.
(a) Use graphical technique (equal area differentiation) and explain when one would want to
use the graph differential and the one advantage of it.
(b) If you were to make additional runs to take additional data points, at what times would
you measure the concentration? Explain.
----------------------------------------------------------------------------------------------(c) Use regression to find the specific reaction rate and the reaction order of the data above.
ProblemSets.docx
ChE 344
Week 8
Problem Set 12
Due Tuesday, February 26, 2013 (Lecture 13)
Individual Assignment
1. PLQ 13 - What are the major differences between Figure 6-1 and Tables 8-1 and 8-2? Submit
to CTools
Group Assignment
1. P8-2A (b) and (c)
2. P8-8B - omit (d)
3. P8-9C (a), (b), (c), and (d)
ProblemSets.docx
ChE 344
Week 8
Problem Set 13
Due Thursday, February 28, 2013 (Lecture 14)
Individual Assignment
1. PLQ 14 - What is an active intermediate? What is the Pseudo Steady State Hypothesis
(PSSH) and what is it used for (Chapter 9)? Submit to CTools before class.
2. You can add up to 5 points directly to your exam I score if you rework every problem you
worked incorrectly AND then write a sentence describing why you think you chose the
incorrect answer or worked the problem incorrectly.
3. P8-3A Amazing Race. Email your performance number to morabitm@umich.edu.
ProblemSets.docx
ChE 344
Week 10
Problem Set 14
Due Tuesday, March 12, 2013 (Lecture 15)
Individual Assignment
Important Concept: Double points for this assignment
1. PLQ 15 (a) How would Example 11-1 change if a CSTR were used instead of a PFR? (b)
What is the difference between “flow work” and “shaft work”? Submit to CTools
2. P8-2A (h)
3. P8-13B (omit parts c, d, g) In this problem the complex reactions described below will first be
carried out in the liquid phase (Parts (a) through (d)) and then in the gas phase (Parts (e)
through (g)). One need not solve the liquid phase to solve the gas phase problem.
4. The following reactions are carried out isothermally.
A + 2B → C + D r1D=k1DCACB2
2D + 3A → C + E r2E=k2ECACD
B + 2C → D + F r3F=k3FCBCC2
5. Additional information:
k1D = 0.25 dm6/mol2·min
k2E = 0.1 dm3/mol·min
CA0 = 1.5 mol/dm3
k3F = 5.0 dm6/mol2·min
CB0 = 2.0 mol/dm3
6. P8-16B omit (c)
7. P9-2 (a)
8. P9-4B omit (c)
ProblemSets.docx
v0 = 10 dm3/min
ChE 344
Week 10
Problem Set 15
Due Thursday, March 14, 2013 (Lecture 16 A & B)
PFRs and PBRs with Heat Exchange
Individual Assignment
1. PLQ 16 - Write two or three sentences describing how one arrives at Eqn (11-29) on page
492. Send to CTools. [possible hint: ri = νi(-rA)]
Group Assignment
1. P9-9B - Life Long Learning Skill Problem (i.e. no lecture on this)
2. Sit down as a group and run the review section (ONLY) for Interactive Computer Games
(ICGs): “Heat Effects I” and “Heat Effects II”. Write a few sentences on what you learned
and discuss if the review is sufficient to replace the derivation of Equation 11-28 in the class
lecture? If not, what needs to be done to have the ICM replace this lecture?
3. P11-2A(b)
4. Use free association to brainstorm 25 uses of old cars for playground equipment at a
children's park.
5. Individual, but turn in as a group assignment
a. Describe 3 critical thinking actions you will practice next week and how you will practice
them.
b. Describe 3 of the 12 ways you will practice to improve your creativity and how you
practice them.
ProblemSets.docx
ChE 344
Week 11
Problem Set 16
Due Tuesday, March 19, 2013 (Lecture 17)
Individual Assignment
1. PLQ 17 - What equations in Tables (11-2) on page 494, (11-3) on page 495 and (12-2) on
page 428-429 would change if there were pressure drop? Submit on CTools.
2. P12-4A (a) - Email performance number to morabitm@umich.edu.
Group Assignment
1. P11-2A (c).
Reworded: Suppose the butane reaction were able to be carried out adiabatically in a 0.8 m3
PFR that could be pressurized to very high temperatures and pressures such that the reaction
still took place in the liquid phase.
a. What inlet temperature would you recommend? Is there an optimum inlet temperature?
b. Plot the heat that must be removed [Q versus V] to maintain isothermal operation.
2. P11-4A
3. P12-2A (b) Look at the Living Example Polymath Problem, only work Parts (1) through (4)
4. P12-5C Parts (a and b)
ProblemSets.docx
ChE 344
Week 11
Problem Set 17
Due Thursday, March 21, 2013 (Lecture 18)
Individual Assignment
1. PLQ 18 - What is the new term added to the algorithm for multiple reactions with heat
effects?
2. P12-4A (b) ICM Heat Effects II
Only do the first 3 reactors as reactors 4 though 7 do not work.
Email performance numbers to morabitm@umich.edu with the subject line “Heat Effects II”
3. Pick up your individualized comprehensive exam after class from one of the GSIs. Each
exam is different with a number next to your name. The exam is due March 29th at 9:30 AM.
ProblemSets.docx
ChE 344
Week 12
Problem Set 18
Due Tuesday, March 26, 2013 (Lecture 19)
Individual Assignment
1. PLQ 19 - What are Kappa, TC and CPo? Why are there three pathways (branches) in Figure
12-3 on page 549?
Group Assignment
Continuation of Class problem from March xx, 2013
1. Return to In Class Problem 14 on Tuesday, March 15, 2013 and also P12-3B. If you did not
complete the ICP, run the base case for each of the heat exchange conditions.
For each case (adiabatic, constant Ta, co-current variable Ta, and counter current variable Ta)
Explain why each of the curves look the way they do. Explain the minimums, maximums or
changes in slopes. E.g., why does the Xe reach a minimum in the figure below?
ProblemSets.docx
Note if you did not finish the In Class Problem, the solution to Tuesday’s (3/xx/13) is now on
CTools.
2. Fill in the following table of exit and maximum conditions. Explain any differences between
the curves.
Type of Heat Exchange
Adiabatic
Constant Ta
Co-Current
Counter Current
X
Xe
y
Ta
T
Tmax
Individual Assignment
1. P12-3B - omit parts (h) and (i).
P584-585 Typos
Problem P12-3B Base Case
ΘB=1
Tao=320 K
m c =1000 mol/s
KC=100 @ 303 K
(f) Change to mol/s
1.0 ≤ m c ≤ 1,000 mol/s
Load the LEP. Develop a personal relationship with this reactor and reaction. Find out all
you can about it by carrying out the parameter variation. Save paper! Only print out the
graph for the base case and show(sketch) trends relative to the base on the base case graph
for each of Parts (a) through (g).
(a) Plot X, y, Xe at the exit versus FA0 and explain any maximum or minimum values.
(b) Plot X, y, Xe at the exit versus ΘI and explain any maximum or minimum values.
(c) Plot X, y, Xe at the exit versus T0 and explain any maximum or minimum values.
(d) Plot X, y, Xe at the exit versus Ta and explain any maximum or minimum values.
(e) Plot X, y, Xe at the exit versus for 1.0 ≤ ṁc ≤ 10,000 mol/s and explain any maximum or
minimum values.
(f) Plot X, y, Xe at the exit versus and note any maximum or minimum values.
Write down and describe all the trends you found of the things that affect your reactor.
2. P12-7B
3. P12-21B
ProblemSets.docx
ChE 344
Week 12
Problem Set 19
Due Thursday, March 28, 2013 (Lecture 20)
Individual Assignment
1. PLQ 20 - What is interstage cooling and why is it used?
Bring Laptops and CDROM from book as we will be using one of the Living Example
Problems
2. P12-16B omit (i) and (j)
ProblemSets.docx
ChE 344
Week 13
Problem Set 20
Due Tuesday, April 2, 2013 (Lecture 21)
Individual Assignment
This comprehensive Problem is a take home exam. It is to be worked individually (You will need
to write and sign the honor code on this problem). Note: After completing Part (a) check your
answer with your GSI before proceeding further. This check will be the only interaction you may
have with the GSI. The GSI will not be able to help you with the problem. They will only be able
to tell you if your answer to part (a) is correct. If it is not correct they will not be able to help you
find your mistakes(s) as this is an exam.
ProblemSets.docx
ChE 344
Week 13
Problem Set 21
Thursday, April 4, 2013 (Lecture 22)
Individual Assignment
1. PLQ 22 - Chapter 10: List the steps in a catalytic reaction. Write the rate law for the surface
reaction steps of (1) adsorption, (2) surface reaction and (3) desorption for the single site
reaction mechanism for A → B.
ProblemSets.docx
ChE 344
Week 14
Problem Set 22
Due Tuesday, April 9, 2013 (Lecture 23)
Individual Assignment
1. PLQ 23 - What are the steps in developing a rate law for a chemical vapor deposition (CVD)?
What is the primary difference between these CVD steps and those in the catalytic rate law?
2. P10-3 ICG: Just go through the review section. Your performance number will be due next
week.
3. P13-2B (f) Load the LEP. Carry out parts (1) through (3) only. In part (3) start by choosing
low, middle, and high values of UA. Use an if () then () statement if you run into trouble
4. P13-4B
5. P10-4B (omit (d))
6. P10-7 (Parts (a), (b) and (c) only)
Study Problem
1. P13-3B Hint: neglect ΔHvap and work through the adiabatic energy balance and CRE
algorithm to show dT/dt = k(-ΔHRx)/(CP) where k(T) = k(970)exp[44500(1/970 - 1/T)],
k(970) = 0.0051 min-1
2. P13-5B
ProblemSets.docx
ChE 344
Week 15
Problem Set 23
Due Tuesday April 16, 2013 (Lecture 24)
Individual Assignment
1. Business as Usual Group. PLQ 24 - What is a Lineweaver-Burk plot? A Michaels-Menton
plot? A Hanes-Woolf plot? When or why would you use each of these plots?
2. OEP Group. Turn in the title of your video along with the names of your group members.
Turn in a one page description of the various techniques on creative thinking (e.g, DeBono,
Lateral Thinking, Futuring, Cross-fertilization, Osborn) you used to develop your video, how
you used them and which techniques have or will be found there why into the final product.
Next Tuesday, you will need to have a 2 minute (maximum time) introduction of the name of
the team members, the name of your video, the CRE principle you chose to highlight and a
description of the creativity techniques you used to develop your video. Your video needs to
be turned in to Arthur Shih (ajyshih@umich.edu) by 8 PM Monday evening 4/xx/13.
-------------------------------------------------------------------------------------Both Groups
1. P10-3A Email your performance number to morabitm@umich.edu.
2. P10-8B
3. P10-10B (omit part (e) and (f))
4. P10-12B (omit part (b) and (c))
5. P10-15B
Study Problems
1. P10-5A
2. P10-6B
ProblemSets.docx
ChE 344
Week 15
Problem Set 24
Due Thursday April 18, 2013 (Lecture 25)
Individual Assignment
1. Business as Usual Group. PLQ 24 - What are CC, CS, CP, CP*, YC/S, YP/C, m, KS, and D?
2. P9-1S Email your performance number to Matt (morabitm@umich.edu) along with your
answer to part(b)
ProblemSets.docx
ChE 344
Problem Set 25
Due Thursday April 23, 2013 (Lecture 26)
8:40 AM START Refreshments Served at 8:25
This class is mandatory for both the Business as Usual and the OEP groups. Bring your
i>clickers for class voting on the videos. Attendance will be recorded by recording your i>clicker
number.
OEP Group
Reminder: Your video needs to be turned in to Arthur Shih (ajyshih@umich.edu) by 8 pm
Monday the xx (submitted in the form of a YouTube link).
Business as Usual Group
Problems Due:
Group Problems
1. P9-2B parts (b) and (c)
2. P9-12B
3. P9-15B parts (a), (b) and (c)
4. P9-19B parts (a), (b) and (c)
Business as Usual Individual Problems. Turn in separately in a different pile on the table.
1. P9-10B parts (d) and (e) count double.
ProblemSets.docx