Chemical Kinetics Worksheet With Answers By Prof. Abdullah M. Asiri - 2009 Page 17
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33August 16, 2009
[PROBLEM SET FROM R. CHANG TEST
BANK]
60. An increase in the temperature of the reactants causes an increase in the rate of reaction. The best
explanation for this behavior is that as the temperature increases,
A.
the concentration of reactants increases.
B.
the activation energy decreases.
C.
the collision frequency increases.
D.
the fraction of collisions with total kinetic energy > E
increases.
a
E.
the activation energy increases.
61. For the chemical reaction system described by the diagram below, which statement is true?
If the E
for the forward reaction is 25 kJ/mol and the enthalpy of reaction is -95 kJ/mol, what is E
for the
a
a
reverse reaction?
A.
120 kJ/mol
B.
70 kJ/mol
C.
95 kJ/mol
D.
25 kJ/mol
E.
-70 kJ/mol
17
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