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Chemistry
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13 Dec 2019

Which of the following statements is/are true for the following reaction: A(g) ⇄ B(g) , ΔH = 10 kJ.

I: The forward reaction is faster than the reverse reaction

II: The activation energy for the forward reaction is larger than reverse reaction

III: Adding a catalyst will decrease both the forward and reverse activation energies

Correct Answer: II and III

Please explain all 3.

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Jarrod Robel
Jarrod RobelLv2
17 Dec 2019

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Related questions

For a onestep reaction, the activation energy for the forward reaction is40.0 kJ mol-1, and the enthalpy ofreaction is -20.0 kJ mol-1. Which statement belowis true?


The value for the enthalpy of reaction would be decreased byaddition of a catalyst.
The reaction is endothermic.
The activation energy of the forward reaction would be affected toa greater extent than the activation energy of the reverse reactionby addition of a catalyst.
The reverse reaction has a higher activation energy than theforward reaction.
The reaction rate would be decreased by an increase intemperature.

For a one step reaction, the activation energy for the forward reaction is 40.0 kJ mol-1, and the enthalpy of reaction is -20.0 kJ mol-1. Which statement below is true?

Select one:

a. The activation energy of the forward reaction would be affected to a greater extent than the activation energy of the reverse reaction by addition of a catalyst.

b. The value for the enthalpy of reaction would be decreased by addition of a catalyst.

c. The reaction is endothermic.

d. The reverse reaction is slower than the forward reaction (smaller rate constant).

e. The reaction rate would be decreased by an increase in temperature.

An uncatalyzed reaction,    has a of -3000 J/mol. Which of the following statements must be true?

A. The activation energy of the reverse reaction is greater than that of the forward reaction.

B. The activation energy of the reverse reaction is lower than that of the forward reaction.

C. If a catalyst is added, the value of for the catalyzed reaction will be smaller in magnitude than the value of   for the uncatalyzed reaction.

D. If a catalyst is added, the value of  for the catalyzed reaction will be larger in magnitude than the value of ΔG for the uncatalyzed reaction.

E. Since the magnitude of is so large, the reaction occurs very rapidly.

 

E. Since the magnitude of ΔG is so large, the reaction occurs very rapidly.

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