Question 1

Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO2 → 2NO + O2
In a particular experiment at 300 °C, [NO2] drops from 0.0100 to 0.00550 M in 100 s. The rate of appearance of O2 for this period is __________ M/s.

Accepted Answer

A)  2.3 × 10-5
B)  4.5 × 10-5
C)  9.0 × 10-5
D)  4.5 × 10-3
E)  9.0 × 10-3

Question 2

What is the order of the reaction with respect to OH-?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4

Question 3

SO2Cl2 decomposes in the gas phase by the reaction SO2Cl2 (g) → SO2 (g) + Cl2 (g) 
The reaction is first order in SO2Cl2 and the rate constant is 3.0 × 10-6s-1 at 600 K. A vessel is charged with 2.4 atm of SO2Cl2 at 600 K. The partial pressure of SO2Cl2 at 3.0 × 105 s is __________ atm.

Accepted Answer

A)  0.76
B)  2.2
C)  0.98
D)  0.29
E)  1.4 × 105

Question 4

The rate law for a reaction is rate = k [A][B]2
Which one of the following statements is false?

Accepted Answer

A)  The reaction is first order in A.
B)  The reaction is second order in B.
C)  The reaction is second order overall.
D)  k is the reaction rate constant
E)  If [B] is doubled, the reaction rate will increase by a factor of 4.

Question 5

A reaction was found to be second order in carbon monoxide concentration. The rate of the reaction __________ if the [CO] is doubled, with everything else kept the same.

Accepted Answer

A)  doubles
B)  remains unchanged
C)  triples
D)  increases by a factor of 4
E)  is reduced by a factor of 2

Question 6

As the temperature of a reaction is increased, the rate of the reaction increases because the __________.

Accepted Answer

A)  reactant molecules collide less frequently
B)  reactant molecules collide more frequently and with greater energy per collision
C)  activation energy is lowered
D)  reactant molecules collide less frequently and with greater energy per collision
E)  reactant molecules collide more frequently with less energy per collision

Question 7

A burning splint will burn more vigorously in pure oxygen than in air because

Accepted Answer

A)  oxygen is a reactant in combustion and concentration of oxygen is higher in pure oxygen than is in air.
B)  oxygen is a catalyst for combustion.
C)  oxygen is a product of combustion.
D)  nitrogen is a product of combustion and the system reaches equilibrium at a lower temperature.
E)  nitrogen is a reactant in combustion and its low concentration in pure oxygen catalyzes the combustion.

Question 8

The combustion of ethylene proceeds by the reaction C2H4(g) + 3O2 (g) → 2CO2 (g) + 2H2O (g) 
When the rate of disappearance of O2 is 0.28 Ms-1, the rate of appearance of CO2 is __________ Ms-1.

Accepted Answer

A)  0.19
B)  0.093
C)  0.84
D)  0.42
E)  0.56

Question 9

What is the order of the reaction with respect to ClO2?

Accepted Answer

A)  1
B)  0
C)  2
D)  3
E)  4

Question 10

The reaction CH3-N≡C → CH3-C≡N
Is a first-order reaction. At 230.3 °C, k = 6.29 × 10-4s-1. If [CH3-NC] is 1.00 × 10-3 initially, [CH3-NC] is __________ after 1.000 × 103 s.

Accepted Answer

A)  5.33 × 10-4
B)  2.34 × 10-4
C)  1.88 × 10-3
D)  4.27 × 10-3
E)  1.00 × 10-6

Question 11

The isomerization of methylisonitrile to acetonitrile CH3NC (g) → CH3CN (g) 
Is first order in CH3NC. The half life of the reaction is 5.20 × 101 s at 545 K. The rate constant when the initial [CH3NC] is 0.030 M is __________ s-1.

Accepted Answer

A)  75.1
B)  0.641
C)  0.0133
D)  1.56
E)  2.84 × 104

Question 12

Which one of the following graphs shows the correct relationship between concentration and time for a reaction that is second order in [A]?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 13

The decomposition of N2O5 in solution in carbon tetrachloride proceeds via the reaction 2N2O5 (soln) → 4NO2 (soln) + O2 (soln) 
The reaction is first order and has a rate constant of 4.82 × 10-3s-1 at 64°C. If the reaction is initiated with 0.058 mol in a 1.00-L vessel, how many moles remain after 151 s?

Accepted Answer

A)  0.055
B)  0.060
C)  0.028
D)  12
E)  2.0 × 103

Question 14

The kinetics of the reaction below were studied and it was determined that the reaction rate did not change when the concentration of B was tripled. The reaction is __________ order in B. A + B → P

Accepted Answer

A)  zero
B)  first
C)  second
D)  third
E)  one-half

Question 15

A reaction was found to be zero order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to __________.

Accepted Answer

A)  remain constant
B)  increase by a factor of 27
C)  increase by a factor of 9
D)  triple
E)  decrease by a factor of the cube root of 3

Question 16

The active site of nitrogenase is a cofactor that contains two transition metals. These transition metals are __________.

Accepted Answer

A)  Cr and Mg
B)  Mn and V
C)  Os and Ir
D)  Fe and Zn
E)  Fe and Mo

Question 17

Reaction rate data showing temperature dependence obey an equation devised by __________.

Accepted Answer

The answer of Reaction rate data showing temperature dependence obey...

Question 18

For a first-order reaction, a plot of __________ versus __________ is linear.

Accepted Answer

A)  ln [A]t, t,   
B)  ln [A]t, t 
C)     
D)  [A]t, t 
E)    " class="answers-bank-image d-inline" rel="preload" >
B)  ln [A]t, t
C)   t,   
B)  ln [A]t, t 
C)     
D)  [A]t, t 
E)    " class="answers-bank-image d-inline" rel="preload" >
D)  [A]t, t
E)   t,   
B)  ln [A]t, t 
C)     
D)  [A]t, t 
E)    " class="answers-bank-image d-inline" rel="preload" >

Question 19

The average rate of appearance of B between 20 s and 30 s is __________ mol/s.

Accepted Answer

A)  +1.5 × 10-3
B)  +5.0 × 10-4
C)  -1.5 × 10-3
D)  +7.3 × 10-3
E)  -7.3 × 10-3

Question 20

The rate constant of a first-order process that has a half-life of 225 s is __________ s-1.

Accepted Answer

A)  0.693
B)  3.08 × 10-3
C)  1.25
D)  12.5
E)  4.44 × 10-3

Exam 14: Chemical Kinetics

Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO₂ → 2NO + O₂ In a particular experiment at 300 °C, [NO₂] drops from 0.0100 to 0.00550 M in 100 s. The rate of appearance of O₂ for this period is __________ M/s.

Correct Answer
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Correct Answer
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Reaction rate data showing temperature dependence obey an equation devised by __________.

Correct Answer
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The isomerization of methylisonitrile to acetonitrile CH₃NC (g) → CH₃CN (g) Is first order in CH₃NC. The half life of the reaction is 5.20 × 10¹ s at 545 K. The rate constant when the initial [CH₃NC] is 0.030 M is __________ s^-1.

Correct Answer
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Correct Answer
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The average rate of appearance of B between 20 s and 30 s is __________ mol/s.

Correct Answer
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As the temperature of a reaction is increased, the rate of the reaction increases because the __________.

Correct Answer
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The active site of nitrogenase is a cofactor that contains two transition metals. These transition metals are __________.

Correct Answer
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A reaction was found to be second order in carbon monoxide concentration. The rate of the reaction __________ if the [CO] is doubled, with everything else kept the same.

Correct Answer
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The combustion of ethylene proceeds by the reaction C₂H₄(g) + 3O₂ (g) → 2CO₂ (g) + 2H₂O (g) When the rate of disappearance of O₂ is 0.28 Ms^-1, the rate of appearance of CO₂ is __________ Ms^-1.

Correct Answer
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The rate law for a reaction is rate = k [A][B]² Which one of the following statements is false?

Correct Answer
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The reaction CH₃-N≡C → CH₃-C≡N Is a first-order reaction. At 230.3 °C, k = 6.29 × 10^-⁴s^-1. If [CH₃-NC] is 1.00 × 10^-³ initially, [CH₃-NC] is __________ after 1.000 × 10³ s.

Correct Answer
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The rate constant of a first-order process that has a half-life of 225 s is __________ s^-1.

Correct Answer
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For a first-order reaction, a plot of versus is linear.

Correct Answer
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What is the order of the reaction with respect to ClO₂?

Correct Answer
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A burning splint will burn more vigorously in pure oxygen than in air because

Correct Answer
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The kinetics of the reaction below were studied and it was determined that the reaction rate did not change when the concentration of B was tripled. The reaction is __________ order in B. A + B → P

Correct Answer
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A reaction was found to be zero order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to __________.

Correct Answer
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What is the order of the reaction with respect to OH^-?

Correct Answer
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Which one of the following graphs shows the correct relationship between concentration and time for a reaction that is second order in [A]?

Correct Answer
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Exam 14: Chemical Kinetics

Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO2 → 2NO + O2 In a particular experiment at 300 °C, [NO2] drops from 0.0100 to 0.00550 M in 100 s. The rate of appearance of O2 for this period is __________ M/s.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Reaction rate data showing temperature dependence obey an equation devised by __________.

Correct AnswerverifiedShow Answer

The isomerization of methylisonitrile to acetonitrile CH3NC (g) → CH3CN (g) Is first order in CH3NC. The half life of the reaction is 5.20 × 101 s at 545 K. The rate constant when the initial [CH3NC] is 0.030 M is __________ s-1.

Correct AnswerverifiedShow Answer

SO2Cl2 decomposes in the gas phase by the reaction SO2Cl2 (g) → SO2 (g) + Cl2 (g) The reaction is first order in SO2Cl2 and the rate constant is 3.0 × 10-6s-1 at 600 K. A vessel is charged with 2.4 atm of SO2Cl2 at 600 K. The partial pressure of SO2Cl2 at 3.0 × 105 s is __________ atm.

Correct AnswerverifiedShow Answer

The average rate of appearance of B between 20 s and 30 s is __________ mol/s.

Correct AnswerverifiedShow Answer

As the temperature of a reaction is increased, the rate of the reaction increases because the __________.

Correct AnswerverifiedShow Answer

The active site of nitrogenase is a cofactor that contains two transition metals. These transition metals are __________.

Correct AnswerverifiedShow Answer

A reaction was found to be second order in carbon monoxide concentration. The rate of the reaction __________ if the [CO] is doubled, with everything else kept the same.

Correct AnswerverifiedShow Answer

The combustion of ethylene proceeds by the reaction C2H4(g) + 3O2 (g) → 2CO2 (g) + 2H2O (g) When the rate of disappearance of O2 is 0.28 Ms-1, the rate of appearance of CO2 is __________ Ms-1.

Correct AnswerverifiedShow Answer

The rate law for a reaction is rate = k [A][B]2 Which one of the following statements is false?

Correct AnswerverifiedShow Answer

The reaction CH3-N≡C → CH3-C≡N Is a first-order reaction. At 230.3 °C, k = 6.29 × 10-4s-1. If [CH3-NC] is 1.00 × 10-3 initially, [CH3-NC] is __________ after 1.000 × 103 s.

Correct AnswerverifiedShow Answer

The rate constant of a first-order process that has a half-life of 225 s is __________ s-1.

Correct AnswerverifiedShow Answer

For a first-order reaction, a plot of __________ versus __________ is linear.

Correct AnswerverifiedShow Answer

What is the order of the reaction with respect to ClO2?

Correct AnswerverifiedShow Answer

A burning splint will burn more vigorously in pure oxygen than in air because

Correct AnswerverifiedShow Answer

The kinetics of the reaction below were studied and it was determined that the reaction rate did not change when the concentration of B was tripled. The reaction is __________ order in B. A + B → P

Correct AnswerverifiedShow Answer

A reaction was found to be zero order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to __________.

Correct AnswerverifiedShow Answer

What is the order of the reaction with respect to OH-?

Correct AnswerverifiedShow Answer

Which one of the following graphs shows the correct relationship between concentration and time for a reaction that is second order in [A]?

Correct AnswerverifiedShow Answer

Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO₂ → 2NO + O₂ In a particular experiment at 300 °C, [NO₂] drops from 0.0100 to 0.00550 M in 100 s. The rate of appearance of O₂ for this period is __________ M/s.

Correct Answer
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Correct Answer
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Correct Answer
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The isomerization of methylisonitrile to acetonitrile CH₃NC (g) → CH₃CN (g) Is first order in CH₃NC. The half life of the reaction is 5.20 × 10¹ s at 545 K. The rate constant when the initial [CH₃NC] is 0.030 M is __________ s^-1.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The combustion of ethylene proceeds by the reaction C₂H₄(g) + 3O₂ (g) → 2CO₂ (g) + 2H₂O (g) When the rate of disappearance of O₂ is 0.28 Ms^-1, the rate of appearance of CO₂ is __________ Ms^-1.

Correct Answer
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The rate law for a reaction is rate = k [A][B]² Which one of the following statements is false?

Correct Answer
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The reaction CH₃-N≡C → CH₃-C≡N Is a first-order reaction. At 230.3 °C, k = 6.29 × 10^-⁴s^-1. If [CH₃-NC] is 1.00 × 10^-³ initially, [CH₃-NC] is __________ after 1.000 × 10³ s.

Correct Answer
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The rate constant of a first-order process that has a half-life of 225 s is __________ s^-1.

Correct Answer
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For a first-order reaction, a plot of versus is linear.

Correct Answer
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What is the order of the reaction with respect to ClO₂?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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What is the order of the reaction with respect to OH^-?

Correct Answer
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Correct Answer
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