What is the value of the activation energy of the uncatalyzed reaction?

Part A
What is the value of the activation energy of the uncatalyzed
reaction?
Express your answer to three significant figures and include the
appropriate units. 
Part B
What is the value of the enthalpy change of the uncatalyzed
reaction?
Express your answer to three significant figures and include the
appropriate units.
Part C
What is the value of the activation energy of the uncatalyzed
reaction in reverse? 
Part D
What is the value of the enthalpy change of the uncatalyzed
reaction in reverse?
Express your answer to three significant figures and include the
appropriate units.
Part E
How does the presence of a catalyst affect the activation energy
of a reaction?
How does the presence of a catalyst affect the activation energy
of a reaction?



A catalyst increases the activation energy of a reaction.


A catalyst decreases the activation energy of a reaction.


A catalyst does not affect the activation energy of a
reaction.


It depends on whether you are talking about the forward or the
reverse reaction.



Part F
How does the presence of a catalyst affect the enthalpy change
of a reaction?
How does the presence of a catalyst affect the enthalpy change
of a reaction?



A catalyst increases the enthalpy change of a reaction.


A catalyst decreases the enthalpy change of a reaction.


A catalyst does not affect the enthalpy change of a
reaction.


It depends on whether you are talking about the forward or the
reverse reaction.



400 300 g 200 100 Uncatalyzed Reaction Reaction coordinate products Part A
What is the value of the activation energy of the uncatalyzed
reaction?
Express your answer to three significant figures and include the
appropriate units. 
Part B
What is the value of the enthalpy change of the uncatalyzed
reaction?
Express your answer to three significant figures and include the
appropriate units.
Part C
What is the value of the activation energy of the uncatalyzed
reaction in reverse? 
Part D
What is the value of the enthalpy change of the uncatalyzed
reaction in reverse?
Express your answer to three significant figures and include the
appropriate units.
Part E
How does the presence of a catalyst affect the activation energy
of a reaction?
How does the presence of a catalyst affect the activation energy
of a reaction?



A catalyst increases the activation energy of a reaction.


A catalyst decreases the activation energy of a reaction.


A catalyst does not affect the activation energy of a
reaction.


It depends on whether you are talking about the forward or the
reverse reaction.



Part F
How does the presence of a catalyst affect the enthalpy change
of a reaction?
How does the presence of a catalyst affect the enthalpy change
of a reaction?



A catalyst increases the enthalpy change of a reaction.


A catalyst decreases the enthalpy change of a reaction.


A catalyst does not affect the enthalpy change of a
reaction.


It depends on whether you are talking about the forward or the
reverse reaction.



400 300 g 200 100 Uncatalyzed Reaction Reaction coordinate products Part A Part A What is the value of the activation energy of the uncatalyzed
reaction? Express your answer to three significant figures and include the
appropriate units. Part B Part B What is the value of the enthalpy change of the uncatalyzed
reaction? Express your answer to three significant figures and include the
appropriate units. Part C Part C What is the value of the activation energy of the uncatalyzed
reaction in reverse? Part D Part D What is the value of the enthalpy change of the uncatalyzed
reaction in reverse? Express your answer to three significant figures and include the
appropriate units. Part E Part E How does the presence of a catalyst affect the activation energy
of a reaction? How does the presence of a catalyst affect the activation energy
of a reaction?

A catalyst increases the activation energy of a reaction.

A catalyst decreases the activation energy of a reaction.

A catalyst does not affect the activation energy of a
reaction.

It depends on whether you are talking about the forward or the
reverse reaction.

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A catalyst increases the activation energy of a reaction.

A catalyst decreases the activation energy of a reaction.

A catalyst does not affect the activation energy of a
reaction.

It depends on whether you are talking about the forward or the
reverse reaction.

A catalyst increases the activation energy of a reaction.
A catalyst increases the activation energy of a reaction.
A catalyst decreases the activation energy of a reaction.
A catalyst decreases the activation energy of a reaction.
A catalyst does not affect the activation energy of a
reaction.
A catalyst does not affect the activation energy of a
reaction.
It depends on whether you are talking about the forward or the
reverse reaction.
It depends on whether you are talking about the forward or the
reverse reaction. Part F Part F How does the presence of a catalyst affect the enthalpy change
of a reaction? How does the presence of a catalyst affect the enthalpy change
of a reaction?

A catalyst increases the enthalpy change of a reaction.

A catalyst decreases the enthalpy change of a reaction.

A catalyst does not affect the enthalpy change of a
reaction.

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It depends on whether you are talking about the forward or the
reverse reaction.

A catalyst increases the enthalpy change of a reaction.

A catalyst decreases the enthalpy change of a reaction.

A catalyst does not affect the enthalpy change of a
reaction.

It depends on whether you are talking about the forward or the
reverse reaction.

A catalyst increases the enthalpy change of a reaction.
A catalyst increases the enthalpy change of a reaction.
A catalyst decreases the enthalpy change of a reaction.
A catalyst decreases the enthalpy change of a reaction.
A catalyst does not affect the enthalpy change of a
reaction.
A catalyst does not affect the enthalpy change of a
reaction.
It depends on whether you are talking about the forward or the
reverse reaction.
It depends on whether you are talking about the forward or the
reverse reaction. 400 300 g 200 100 Uncatalyzed Reaction Reaction coordinate products

A)
Activation energy = energy of activated complex – energy of
reactant
= 400 KJ – 225 KJ
= 175 KJ
Answer: 175 KJ
B)
Enthalpy change = energy of product – energy of reactant
= 100 KJ – 225 KJ
= -125 KJ
Answer: -125 KJ
C)
Activation energy of reverse reaction = energy of activated
complex – energy of product
= 400 KJ – 100 KJ
= 300 KJ
Answer: 300 KJ
D)
Enthalpy change of reverse reaction = energy of reactant –
energy of product
= 225 KJ – 100 KJ
= 125 KJ
Answer: 125 KJ
E)
Catalyst has decreased the Activation energy
Answer: option 2
F)
Catalyst do not effect the Enthalpy change
Answer: option 3

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