Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 22
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33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
74. Nitrous oxide (N
O) decomposes at 600°C according to the balanced equation
2
O(g) → 2N
2N
(g) + O
(g)
2
2
2
A reaction mechanism involving three steps is shown below. Identify all of the catalysts in the following
mechanism.
(g) → 2Cl(g)
Cl
2
O(g) + Cl(g) → N
N
(g) + ClO(g) (occurs twice)
2
2
ClO(g) + ClO(g) → Cl
(g) + O
(g)
2
2
A.
Cl
B.
Cl
2
C.
ClO
D.
N
O
2
E.
ClO and Cl
75. Peroxodisulfate ion can oxidize iodide ions to iodine according to the balanced equation
→ 2SO
2-
-
2-
S
O
+ 2I
+ I
.
2
8
4
2
The reaction is catalyzed by certain chemical species. Identify the catalyst in the following mechanism:
3+
A.
Fe
-
B.
I
2-
C.
S
O
2
8
2+
D.
Fe
2-
E.
SO
4
76. In which of the forms listed below would 0.5 g aluminum react the fastest with gaseous chlorine at 25°C?
A.
0.5 g aluminum in one piece
B.
0.5 g aluminum divided into 10 pieces
C.
0.5 g aluminum divided into 100 pieces
D.
0.5 g aluminum divided into 1,000 pieces
E.
All the choices will react at the same rate since the temperature is the same.
77. For the reaction whose rate law is rate = k[X], a plot of which of the following is a straight line?
A.
[X] versus time
B.
log [X] versus time
C.
1/[X] versus time
D.
[X] versus 1/time
E.
log [X] versus 1/time
22
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