Question 1

The reaction A  →\rarr→  Products is a zero-order reaction with a rate constant of 2.56 × 10-3 M s-1. If the concentration of A is 75.6 M after 12.7 minutes, what was the initial concentration of A?

Accepted Answer

A)  838 M
B)  100 M
C)  75.6 M
D)  77.6 M
E)  73.6 M F) B) and C)
G) B) and E)

Question 2

Which statement describes the situation when a catalyst is used in a reaction? Remember that the book says that the term 'catalyst' will be used to mean a positive catalyst.

Accepted Answer

A)  The forward reaction rate is increased while the reverse reaction rate is slowed.
B)  The heat change for the reaction becomes more exothermic.
C)  The final (equilibrium) amounts of reactants and products are not affected.
D)  The activation energy for the reverse reaction is increased.
E)  The activation energy for the forward reaction is not altered.F) None of the above
G) A) and D)

Question 3

The reaction: 2A + 2B  →\rarr→  D + F was studied carefully and the following mechanism was determined. 2 B) rate = k[A]2[B]2 C) rate = k[C][B] D) rate = k[A][B]3 E) rate = k[A][B] " class="answers-bank-image d-inline" rel="preload" > The rate law for the reaction would therefore be

Accepted Answer

A)  rate = k[A]2
B)  rate = k[A]2[B]2
C)  rate = k[C][B]
D)  rate = k[A][B]3
E)  rate = k[A][B] F) A) and B)
G) None of the above

Question 4

The reaction 2NO (g) + 2H2 (g)  →\rarr→ N2 (g) + 2H2O (g) was found to follow the rate law:rate = k[NO]2[H2]. By what factor will the rate of reaction increase if the pressure of NO gas is increased from 2.0 atm to 3.0 atm? Assume all other conditions are held constant.

Accepted Answer

A)  1.5
B)  1
C)  2.25
D)  2
E)  3 F) A) and D)
G) A) and E) C

Question 5

What is the order of the reaction with respect to reactant B? Determining A Rate Law From Experimental Data The following data was found for the reactionA + B  →\rarr→  Products

Accepted Answer

A)  Zero
B)  First
C)  Second
D)  Third
E)  Fourth F) C) and D)
G) None of the above

Question 6

The activation energy of a reaction is equal to the difference between the potential energy of the reactants and the potential energy of the products.

Accepted Answer

A) True 
 B)False  False

Question 7

The units of the rate constant for a particular reaction are min-1. What is the overall order of the reaction?

Accepted Answer

A)  Zero
B)  First
C)  Second
D)  Third
E)  FourthF) All of the above
G) A) and E)

Question 8

A chemical reaction has been the subject of intense study, and a rate law, rate = k[A][B]2, was developed which summarized the mechanistic findings. Which change to the system will not cause an increase in the rate constant under any circumstances?

Accepted Answer

A)  raising the temperature by 25 degrees
B)  adding a positive catalyst
C)  tripling the concentration of A
D)  doubling the concentration of B
E)  lowering the temperature by 0.5 degreesF) A) and E)
G) C) and D)

Question 9

The reaction mechanism proposed for the decomposition of H2O2 is 2O2 is   Which statement is true? A) The reaction is first order with respect to NO2. B) NO2 is an intermediate. C) The reaction is first order with respect to CO. D) The reaction is second order with respect to NO2. E) The reaction is zero order with respect to NO2." class="answers-bank-image d-inline" rel="preload" > Which statement is true?

Accepted Answer

A)  The reaction is first order with respect to NO2.
B)  NO2 is an intermediate.
C)  The reaction is first order with respect to CO.
D)  The reaction is second order with respect to NO2.
E)  The reaction is zero order with respect to NO2.F) B) and C)
G) A) and B)

Question 10

A reaction has the following proposed mechanism:  Using this mechanism, what is the overall reaction?

Accepted Answer

The answer of A reaction has the following proposed mechanism:...

Question 11

What effect does a negative catalyst have on the value of the rate constant for a particular reaction?

Accepted Answer

It causes ...

Question 12

The units of the rate constant for a particular reaction are L mol-1 min-1. What is the overall order of the reaction?

Accepted Answer

Second ord...

Question 13

A first-order reaction has a rate constant of 0.00318 min1. The half-life of this reaction is, therefore,

Accepted Answer

A)  94.7 minutes.
B)  218 minutes.
C)  31.4 minutes.
D)  5.24 seconds.
E)  68.6 minutes.F) B) and D)
G) A) and D) B

Question 14

A 10-mm cube of copper metal is placed in 250 mL of 12 M nitric acid at 25°C and the reaction below occurs: Cu(s) + 4H+(aq) + 2NO3-(aq)  →\rarr→  Cu2+(aq) + 2NO2(g) + 2H2O(l) At a particular instant in time, nitrogen dioxide is being produced at the rate of +(aq) + 2NO3-(aq)  \rarr  Cu2+(aq) + 2NO2(g) + 2H2O(l) At a particular instant in time, nitrogen dioxide is being produced at the rate of   . At this same instant, what is the rate at which hydrogen ions are being consumed? A) 1.3 × 10-4 M/min B) 5.2 × 10-4 M/min C) 2.6 × 10-4 M/min D) 1.0 × 10-3 M/min E) 6.5 × 10-5 M/min " class="answers-bank-image d-inline" rel="preload" > . At this same instant, what is the rate at which hydrogen ions are being consumed?

Accepted Answer

A)  1.3 × 10-4 M/min
B)  5.2 × 10-4 M/min
C)  2.6 × 10-4 M/min
D)  1.0 × 10-3 M/min
E)  6.5 × 10-5 M/min F) B) and E)
G) A) and D)

Question 15

If a reaction involving a single reactant is first order, with a rate constant of 4.50 × 10-2 s-1, how much time is required for 75.0% of the initial quantity of reactant to be used up?

Accepted Answer

A)  16.7 seconds
B)  30.9 seconds
C)  23.1 seconds
D)  25.3 seconds
E)  11.6 secondsF) B) and C)
G) C) and D)

Question 16

A catalyst used by a biological system is given a special name called a(n)

Accepted Answer

The answer of A catalyst used by a biological system...

Question 17

Given this data from a study on how the rate of a reaction was affected by the concentration of the reactants, determine the rate constant for the reaction. 2 mol-2 hr-1 B) 208 L2 mol-2 hr-1 C) 139 L2 mol-2 hr-1 D) 2083 L2 mol-2 hr-1 E) 6667 L2 mol-2 hr-1" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  2500 L2 mol-2 hr-1
B)  208 L2 mol-2 hr-1
C)  139 L2 mol-2 hr-1
D)  2083 L2 mol-2 hr-1
E)  6667 L2 mol-2 hr-1F) A) and B)
G) A) and C)

Question 18

For a one-step reaction, the activation energy for the forward reaction is 40.0 kJ mol-1, and the heat of reaction is 20.0 kJ mol-1. Calculate the activation energy for the reverse reaction.

Accepted Answer

A)  +60.0 kJ mol-1
B)  -20.0 kJ mol-1
C)  -1200 kJ mol-1
D)  +20.0 kJ mol-1
E)  +1200 kJ mol-1F) A) and C)
G) B) and E)

Question 19

The reaction mechanism proposed for the decomposition of H2O2 is 2O2 is   Which statement is true? A) The reaction is second order with respect to I-. B) I is an intermediate. C) The reaction is first order with respect to I-. D) IO- is a catalyst. E) The reaction is zero order with respect to I-." class="answers-bank-image d-inline" rel="preload" > Which statement is true?

Accepted Answer

A)  The reaction is second order with respect to I-.
B)  I is an intermediate.
C)  The reaction is first order with respect to I-.
D)  IO- is a catalyst.
E)  The reaction is zero order with respect to I-.F) A) and D)
G) B) and C)

Question 20

In order to carry out chemical kinetics studies, all reactants must be in a catalyzed form so that they will form products at the regular rate.

Accepted Answer

A) True 
 B)False

Exam 14: Chemical Kinetics

The reaction A $\rarr$ Products is a zero-order reaction with a rate constant of 2.56 × 10^-³ M s^-¹. If the concentration of A is 75.6 M after 12.7 minutes, what was the initial concentration of A?

Correct Answer
verified

Which statement describes the situation when a catalyst is used in a reaction? Remember that the book says that the term 'catalyst' will be used to mean a positive catalyst.

Correct Answer
verified

Correct Answer
verified

The reaction 2NO (g) + 2H₂(g) $\rarr$ N₂ (g) + 2H₂O (g) was found to follow the rate law:rate = k[NO]²[H₂]. By what factor will the rate of reaction increase if the pressure of NO gas is increased from 2.0 atm to 3.0 atm? Assume all other conditions are held constant.

Correct Answer
verified
C

Correct Answer
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The activation energy of a reaction is equal to the difference between the potential energy of the reactants and the potential energy of the products.

Correct Answer
verified
False

The units of the rate constant for a particular reaction are min^-1. What is the overall order of the reaction?

Correct Answer
verified

A chemical reaction has been the subject of intense study, and a rate law, rate = k[A][B]², was developed which summarized the mechanistic findings. Which change to the system will not cause an increase in the rate constant under any circumstances?

Correct Answer
verified

The reaction mechanism proposed for the decomposition of H₂O₂ is Which statement is true?

Correct Answer
verified

A reaction has the following proposed mechanism: Using this mechanism, what is the overall reaction?

Correct Answer
verified

What effect does a negative catalyst have on the value of the rate constant for a particular reaction?

Correct Answer
verified
It causes ...
View Answer

The units of the rate constant for a particular reaction are L mol^-1^min^-1^. What is the overall order of the reaction?

Correct Answer
verified
Second ord...
View Answer

A first-order reaction has a rate constant of 0.00318 min¹. The half-life of this reaction is, therefore,

Correct Answer
verified
B

Correct Answer
verified

If a reaction involving a single reactant is first order, with a rate constant of 4.50 × 10^-² s^-¹, how much time is required for 75.0% of the initial quantity of reactant to be used up?

Correct Answer
verified

A catalyst used by a biological system is given a special name called a(n)

Correct Answer
verified

Given this data from a study on how the rate of a reaction was affected by the concentration of the reactants, determine the rate constant for the reaction.

Correct Answer
verified

For a one-step reaction, the activation energy for the forward reaction is 40.0 kJ mol^-1, and the heat of reaction is 20.0 kJ mol^-1. Calculate the activation energy for the reverse reaction.

Correct Answer
verified

The reaction mechanism proposed for the decomposition of H₂O₂ is Which statement is true?

Correct Answer
verified

In order to carry out chemical kinetics studies, all reactants must be in a catalyzed form so that they will form products at the regular rate.

Correct Answer
verified

Exam 14: Chemical Kinetics

The reaction A →\rarr→ Products is a zero-order reaction with a rate constant of 2.56 × 10-3 M s-1. If the concentration of A is 75.6 M after 12.7 minutes, what was the initial concentration of A?

Correct AnswerverifiedShow Answer

Which statement describes the situation when a catalyst is used in a reaction? Remember that the book says that the term 'catalyst' will be used to mean a positive catalyst.

Correct AnswerverifiedShow Answer

The reaction: 2A + 2B →\rarr→ D + F was studied carefully and the following mechanism was determined. The rate law for the reaction would therefore be

Correct AnswerverifiedShow Answer

The reaction 2NO (g) + 2H2 (g) →\rarr→ N2 (g) + 2H2O (g) was found to follow the rate law:rate = k[NO]2[H2]. By what factor will the rate of reaction increase if the pressure of NO gas is increased from 2.0 atm to 3.0 atm? Assume all other conditions are held constant.

Correct AnswerverifiedC

What is the order of the reaction with respect to reactant B? Determining A Rate Law From Experimental Data The following data was found for the reactionA + B →\rarr→ Products

Correct AnswerverifiedShow Answer

The activation energy of a reaction is equal to the difference between the potential energy of the reactants and the potential energy of the products.

Correct AnswerverifiedFalse

The units of the rate constant for a particular reaction are min-1. What is the overall order of the reaction?

Correct AnswerverifiedShow Answer

A chemical reaction has been the subject of intense study, and a rate law, rate = k[A][B]2, was developed which summarized the mechanistic findings. Which change to the system will not cause an increase in the rate constant under any circumstances?

Correct AnswerverifiedShow Answer

The reaction mechanism proposed for the decomposition of H2O2 is Which statement is true?

Correct AnswerverifiedShow Answer

A reaction has the following proposed mechanism: Using this mechanism, what is the overall reaction?

Correct AnswerverifiedShow Answer

What effect does a negative catalyst have on the value of the rate constant for a particular reaction?

Correct AnswerverifiedIt causes ...View AnswerShow Answer

The units of the rate constant for a particular reaction are L mol-1 min-1. What is the overall order of the reaction?

Correct AnswerverifiedSecond ord...View AnswerShow Answer

A first-order reaction has a rate constant of 0.00318 min1. The half-life of this reaction is, therefore,

Correct AnswerverifiedB

Correct AnswerverifiedShow Answer

If a reaction involving a single reactant is first order, with a rate constant of 4.50 × 10-2 s-1, how much time is required for 75.0% of the initial quantity of reactant to be used up?

Correct AnswerverifiedShow Answer

A catalyst used by a biological system is given a special name called a(n)

Correct AnswerverifiedShow Answer

Given this data from a study on how the rate of a reaction was affected by the concentration of the reactants, determine the rate constant for the reaction.

Correct AnswerverifiedShow Answer

For a one-step reaction, the activation energy for the forward reaction is 40.0 kJ mol-1, and the heat of reaction is 20.0 kJ mol-1. Calculate the activation energy for the reverse reaction.

Correct AnswerverifiedShow Answer

The reaction mechanism proposed for the decomposition of H2O2 is Which statement is true?

Correct AnswerverifiedShow Answer

In order to carry out chemical kinetics studies, all reactants must be in a catalyzed form so that they will form products at the regular rate.

Correct AnswerverifiedShow Answer

The reaction A $\rarr$ Products is a zero-order reaction with a rate constant of 2.56 × 10^-³ M s^-¹. If the concentration of A is 75.6 M after 12.7 minutes, what was the initial concentration of A?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The reaction 2NO (g) + 2H₂(g) $\rarr$ N₂ (g) + 2H₂O (g) was found to follow the rate law:rate = k[NO]²[H₂]. By what factor will the rate of reaction increase if the pressure of NO gas is increased from 2.0 atm to 3.0 atm? Assume all other conditions are held constant.

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified
False

The units of the rate constant for a particular reaction are min^-1. What is the overall order of the reaction?

Correct Answer
verified

A chemical reaction has been the subject of intense study, and a rate law, rate = k[A][B]², was developed which summarized the mechanistic findings. Which change to the system will not cause an increase in the rate constant under any circumstances?

Correct Answer
verified

The reaction mechanism proposed for the decomposition of H₂O₂ is Which statement is true?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
It causes ...
View Answer

The units of the rate constant for a particular reaction are L mol^-1^min^-1^. What is the overall order of the reaction?

Correct Answer
verified
Second ord...
View Answer

A first-order reaction has a rate constant of 0.00318 min¹. The half-life of this reaction is, therefore,

Correct Answer
verified
B

Correct Answer
verified

If a reaction involving a single reactant is first order, with a rate constant of 4.50 × 10^-² s^-¹, how much time is required for 75.0% of the initial quantity of reactant to be used up?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For a one-step reaction, the activation energy for the forward reaction is 40.0 kJ mol^-1, and the heat of reaction is 20.0 kJ mol^-1. Calculate the activation energy for the reverse reaction.

Correct Answer
verified

The reaction mechanism proposed for the decomposition of H₂O₂ is Which statement is true?

Correct Answer
verified

Correct Answer
verified