Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 10
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33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
34. At 25°C, the second-order reaction NOCl(g) → NO(g) + 1/2Cl
(g) is 50% complete after 5.82 hours when
2
the initial concentration of NOCl is 4.46 mol/L. How long will it take for the reaction to be 75%
complete?
A.
8.22 hr
B.
11.6 hr
C.
15.5 hr
D.
17.5 hr
E.
23.0 hr
35. For the reaction X + Y → Z, the reaction rate is found to depend only upon the concentration of X. A plot
of 1/X verses time gives a straight line.
What is the rate law for this reaction?
A.
rate = k [X]
2
B.
rate = k [X]
C.
rate = k [X][Y]
2
D.
rate = k [X]
[Y]
(g) → 2NO(g) + O
36. The reaction 2NO
(g) is suspected to be second order in NO
. Which of the following
2
2
2
kinetic plots would be the most useful to confirm whether or not the reaction is second order?
-1
A.
a plot of [NO
]
vs. t
2
B.
a plot of ln [NO
] vs. t
2
C.
a plot of [NO
] vs. t
2
-1
D.
a plot of ln [NO
]
vs. t
2
2
E.
a plot of [NO
]
vs. t
2
10
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