Question 1

Concerning the rate law, Rate = k[A][B], what are appropriate units for the rate constant k?

Accepted Answer

A)  s-1
B)  M-1s-1
C)  M-2s-1
D)  M/s
E)  M2/sF) None of the above
G) B) and D)

Question 2

The isomerization of cyclopropane follows first order kinetics.The rate constant at 700 K is 6.20 × 10-4 min-1, and the half-life at 760 K is 29.0 min.Calculate the activation energy for this reaction.

Accepted Answer

A)  5.07 kJ/mol
B)  27.0 kJ/mol
C)  50.7 kJ/mol
D)  60.kJ/mol
E)  270.kJ/molF) B) and D)
G) A) and E)

Question 3

The graphs below all refer to the same reaction.What is the order of this reaction?

Accepted Answer

A)  zero order
B)  first order
C)  second order
D)  unable to predictE) B) and C)
F) A) and D)

Question 4

Nitric acid is formed by the gas-phase hydrolysis of N2O5.Draw an energy profile curve for the reaction N2O5 + H2O $\rarr$2HNO3 given that Ea(forward)= 15 kJ and Ea(reverse)= 51 kJ/mol.Label the activation energies of the forward and reverse reactions and label $\Delta$H for the reaction.

Accepted Answer

Question 5

With respect to the figure below, which choice correctly identifies all the numbered positions?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) A) and B)
G) A) and C)

Question 6

When the concentrations of reactant molecules are increased, the rate of reaction increases.The best explanation for this phenomenon is that as the reactant concentration increases,

Accepted Answer

A)  the average kinetic energy of molecules increases.
B)  the frequency of molecular collisions increases.
C)  the rate constant increases.
D)  the activation energy increases.
E)  the order of reaction increases.F) D) and E)
G) B) and C)

Question 7

Aspirin, C9H8O4, slowly decomposes at room temperature by reacting with water in the atmosphere to produce acetic acid, HC2H3O2, and 2-hydroxybenzoic acid, C7H6O3 (this is why old bottles of aspirin often smell like vinegar):
C9H8O4 + H2O $\rarr$HC2H3O2 + C7H6O3
  
Concentration and rate data for this reaction are given below.   
Write the rate law for this reaction and calculate k (be sure to include the correct units).

Accepted Answer

The rate law is rate...

Question 8

Chlorine dioxide reacts in basic water to form chlorite and chlorate according to the following chemical equation: 
2ClO2(aq) + 2OH-(aq)   →\rarr→ ClO2-(aq) + ClO3-(aq) + H2O(l) 
A kinetic study of this reaction under a certain set of conditions yielded the data below. 2(aq) + 2OH-(aq)   \rarr ClO2-(aq) + ClO3-(aq) + H2O(l)  A kinetic study of this reaction under a certain set of conditions yielded the data below.      Which one of the following is the rate law for this reaction? A) rate = k[ClO2][OH-] B) rate = k[ClO2]2[OH-] C) rate = k[ClO2][OH-]2 D) rate = k[ClO2]2[OH-]2 E) rate = k[ClO2]4[OH-] " class="answers-bank-image d-inline" rel="preload" >  
 Which one of the following is the rate law for this reaction?

Accepted Answer

A)  rate = k[ClO2][OH-]
B)  rate = k[ClO2]2[OH-]
C)  rate = k[ClO2][OH-]2
D)  rate = k[ClO2]2[OH-]2
E)  rate = k[ClO2]4[OH-] F) B) and D)
G) B) and C)

Question 9

For the reaction X + Y  →\rarr→ Z, the reaction rate is found to depend only upon the concentration of X.A plot of 1/X verses time gives a straight line.

2 C) rate = k [X][Y] D) rate = k [X]2[Y] " class="answers-bank-image d-inline" rel="preload" >
 What is the rate law for this reaction?

Accepted Answer

A)  rate = k [X]
B)  rate = k [X]2
C)  rate = k [X][Y]
D)  rate = k [X]2[Y] E) B) and C)
F) A) and D)

Question 10

A certain first-order reaction A  →\rarr→  B is 25% complete in 42 min at 25°C.What is the half-life of the reaction?

Accepted Answer

A)  21 min
B)  42 min
C)  84 min
D)  20 min
E)  101 min F) A) and B)
G) C) and E)

Exam 13: Chemical Kinetics

The isomerization of cyclopropane follows first order kinetics.The rate constant at 700 K is 6.20 × 10^-4min^-1, and the half-life at 760 K is 29.0 min.Calculate the activation energy for this reaction.

Correct Answer
verified

A certain first-order reaction A $\rarr$ B is 25% complete in 42 min at 25°C.What is the half-life of the reaction?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The graphs below all refer to the same reaction.What is the order of this reaction?

Correct Answer
verified

With respect to the figure below, which choice correctly identifies all the numbered positions?

Correct Answer
verified

Concerning the rate law, Rate = k[A][B], what are appropriate units for the rate constant k?

Correct Answer
verified

When the concentrations of reactant molecules are increased, the rate of reaction increases.The best explanation for this phenomenon is that as the reactant concentration increases,

Correct Answer
verified

Correct Answer
verified
The rate law is rate...
View Answer

Correct Answer
verified

Exam 13: Chemical Kinetics

The isomerization of cyclopropane follows first order kinetics.The rate constant at 700 K is 6.20 × 10-4 min-1, and the half-life at 760 K is 29.0 min.Calculate the activation energy for this reaction.

Correct AnswerverifiedShow Answer

A certain first-order reaction A →\rarr→ B is 25% complete in 42 min at 25°C.What is the half-life of the reaction?

Correct AnswerverifiedShow Answer

Nitric acid is formed by the gas-phase hydrolysis of N2O5.Draw an energy profile curve for the reaction N2O5 + H2O →\rarr→ 2HNO3 given that Ea(forward)= 15 kJ and Ea(reverse)= 51 kJ/mol.Label the activation energies of the forward and reverse reactions and label Δ\DeltaΔ H for the reaction.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The graphs below all refer to the same reaction.What is the order of this reaction?

Correct AnswerverifiedShow Answer

With respect to the figure below, which choice correctly identifies all the numbered positions?

Correct AnswerverifiedShow Answer

Concerning the rate law, Rate = k[A][B], what are appropriate units for the rate constant k?

Correct AnswerverifiedShow Answer

When the concentrations of reactant molecules are increased, the rate of reaction increases.The best explanation for this phenomenon is that as the reactant concentration increases,

Correct AnswerverifiedShow Answer

Correct AnswerverifiedThe rate law is rate...View AnswerShow Answer

For the reaction X + Y →\rarr→ Z, the reaction rate is found to depend only upon the concentration of X.A plot of 1/X verses time gives a straight line. What is the rate law for this reaction?

Correct AnswerverifiedShow Answer

The isomerization of cyclopropane follows first order kinetics.The rate constant at 700 K is 6.20 × 10^-4min^-1, and the half-life at 760 K is 29.0 min.Calculate the activation energy for this reaction.

Correct Answer
verified

A certain first-order reaction A $\rarr$ B is 25% complete in 42 min at 25°C.What is the half-life of the reaction?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The rate law is rate...
View Answer

Correct Answer
verified