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CE 561, Exam 1, October 30, 2009
This exam consists of 4
questions, some with multiple parts.
You should be careful not to get stuck
on one part.
If you do not know how to do a problem, move on and return to it if you have time at
the end.
You may use a calculator and three lettersize sheets (2sided) of notes to aid you on this exam.
You
may not exchange notes with or otherwise consult your fellow students.
If you talk to your fellow
students during the exam, I will assume that you are cheating, you will be asked to leave, and you
will fail the exam.
You will have 3 hours to complete the exam.
Please use a separate blue book for each exam
problem.
Carefully explain any assumptions you make, label what part of what problem you are
working on, and define the symbols that you use.
The point value of each part is indicated – budget
your effort accordingly.
There are 100 points total.
1.
Consider the following reactions:
(1)
C
3
H
8
→
C
3
H
6
+ H
2
with rate
r
1
=
k
1
[C
3
H
8
]
(2)
C
3
H
8
→ C
2
H
4
+ CH
4
with rate
r
2
=
k
2
[C
3
H
8
]
(3)
C
2
H
6
→ C
2
H
4
+ H
2
with rate
r
3
=
k
3
[C
2
H
6
]
(4)
C
2
H
4
→ C
2
H
2
+ H
2
with rate
r
4
=
k
4
[C
2
H
4
]
(a)
Write these reactions in matrix form. (5 points)
(b)
Write the rate equations for the concentrations of the seven species in matrix form (for isothermal
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 Fall '09

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