Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 16
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33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
for a certain biological reaction is 48 kJ/mol and that the rate constant is 2.5 × 10
-2
-1
57. Given that E
s
at
a
15°C, what is the rate constant at 37°C?
2.7 × 10
-2
-1
A.
s
2.5 × 10
-1
-1
B.
s
1.0 × 10
-1
-1
C.
s
6.0 × 10
-3
-1
D.
s
-1
E.
1.1 s
→ 2O
is 25 kJ/mol, and the enthalpy change is ∆H = -388
58. The activation energy for the reaction O + O
3
2
kJ/mol. What is the activation energy for the decomposition of O
by the reverse reaction?
2
A.
413 kJ
B.
388 kJ
C.
363 kJ
D.
50 kJ
E.
25 kJ
59. For the chemical reaction system described by the diagram below, which statement is true?
A.
The forward reaction is endothermic.
B.
The activation energy for the forward reaction is greater than the activation energy for the reverse
reaction.
C.
At equilibrium, the activation energy for the forward reaction is equal to the activation energy for the
reverse reaction.
D.
The activation energy for the reverse reaction is greater than the activation energy for the forward
reaction.
E.
The reverse reaction is exothermic.
16
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