Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 24
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33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
82. The first-order decomposition of SO
Cl
to sulfur dioxide gas and chlorine gas at 320°C has a half-life of
2
2
8.75 hr. If one begins with 600. mmHg of pure SO
Cl
in a 5.00-L flask at 320°C, how long does it take
2
2
for the total pressure in the flask to rise to 1.000 atm?
A.
6.45 hr
B.
11.1 hr
C.
3.91 hr
D.
20.3 hr
E.
6.91 hr
83. The first-order decomposition of phosphene to phosphorus and hydrogen
(g) → P
4PH
(g) + 6H
(g)
3
4
2
has a half-life of 35.0 s at 680°C. Starting with 520 mmHg of pure phosphene in an 8.00-L flask at 680°,
how long will it take for the total pressure in the flask to rise to 1.000 atm?
A.
628 s
B.
33.4 s
C.
51.2 s
D.
111 s
E.
48.3 s
84. Use the table of data shown below to calculate the average rate of the reaction A → B between 10 s and 20
s.
24
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