Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 19
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33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
-
66. The following reaction in aqueous solution was found to be first order in [OH
], first order in [C
H
Br],
2
5
-
and inverse first order in Br
.
→ C
-
-
C
H
Br + OH
H
OH + Br
2
5
2
5
Which one of the following mechanisms is consistent with the observed reaction order?
A.
B.
C.
D.
→ N
67. The rate law for the reaction 2NO
+ O
O
+ O
is rate = k[NO
][O
]. Which one of the following
2
3
2
5
2
2
3
mechanisms is consistent with this rate law?
A.
B.
C.
D.
+ Y + Z → XY + XZ, it is found that the rate equation is rate = k [X
68. For the reaction X
][Y]. Why does
2
2
the concentration of Z have no effect on the rate?
A.
The concentration of Z is very small and the others are very large.
B.
Z must react in a step after the rate determining step.
C.
Z is an intermediate.
D.
The fraction of molecules of Z that have very high energies is zero.
E.
The activation energy for Z to react is very high.
19
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