Question 1

The rate is second order with respect to the reactant and second order overall.
Rate = k[A]2

Accepted Answer

A) True 
 B)False

Question 2

The following data was obtained at 20 °C. X (g) → Y (g)   The rate law for this reaction is ________.

Accepted Answer

A)  Rate = k[X]2 
B)  Rate = k[X] 
C)  Rate = k[X]0 
D)  Rate = k[X]-1 
A)  Rate = k[X]2 
B)  Rate = k[X] 
C)  Rate = k[X]0 
D)  Rate = k[X]-1

Question 3

The following data was obtained at 20 °C. 2W (g) → V (g)   The rate law for this reaction is ________.

Accepted Answer

A)  Rate = k[W]2 
B)  Rate = k[W] 
C)  Rate = k[W]0 
D)  Rate = k[W]-1 
A)  Rate = k[W]2 
B)  Rate = k[W] 
C)  Rate = k[W]0 
D)  Rate = k[W]-1

Question 4

The greater the concentration of the reactants, the greater the rate of the reaction.

Accepted Answer

A) True 
 B)False

Question 5

Knowing the mechanism of a reaction is advantageous because one may influence its rate to make the reaction useful.

Accepted Answer

A) True 
 B)False

Question 6

Reaction rates can be varied by changing either the concentrations of the reacting species or the temperature at which the reaction is carried out.

Accepted Answer

A) True 
 B)False

Question 7

Consider the reaction A → B with the following data: Energy of reactants = 50 kJ/mole;
Energy of products = 70 kJ/mole;
Energy of transition state = 80 kJ/mole.
The reaction is ________, has a heat of reaction of ________ kJ/mole, and the energy of activation is ________ kJ/mole.

Accepted Answer

A)  exothermic; 20; 30 
B)  endothermic; 20; 30 
C)  exothermic; 30; 20 
D)  endothermic; 30; 20 
A)  exothermic; 20; 30 
B)  endothermic; 20; 30 
C)  exothermic; 30; 20 
D)  endothermic; 30; 20

Question 8

If the reaction has a negative overall energy change, then ________.

Accepted Answer

A)  the reaction is exothermic 
B)  energy is absorbed by the reactants 
C)  the reaction is endothermic 
D)  the products are not stable 
A)  the reaction is exothermic 
B)  energy is absorbed by the reactants 
C)  the reaction is endothermic 
D)  the products are not stable

Question 9

Which of the following represents a reaction coordinate diagram for a chemical reaction whose ΔErxn = 0?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 10

Match the rate of each reaction with the overall order .
-Rate = k[A]2[B]-1

Accepted Answer

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

Question 11

Based on the collision theory, decreasing temperature for a reaction increases the reaction rate.

Accepted Answer

A) True 
 B)False

Question 12

The rate determining step is always the fastest step.

Accepted Answer

A) True 
 B)False

Question 13

Examine this reaction coordinate diagram, and answer the questions that follow.   a) Estimate the value for the activation energy for this reaction.
b) Calculate ΔErxn.
c) Is this reaction exothermic or endothermic?

Accepted Answer

a) 150 kJ/

Question 14

Consider the reaction X → Y with the following data: Energy of reactants = 25 kJ/mole;
Energy of products = 75 kJ/mole;
Energy of transition state = 100 kJ/mole.
The energy of activation for the reverse reaction is ________ kJ/mole.

Accepted Answer

A)  25 
B)  50. 
C)  75 
D)  100 
A)  25 
B)  50. 
C)  75 
D)  100

Question 15

The following data was obtained at 100 °C. 2 Y (g) + X (g) → Z (g)   The rate law for this reaction is ________..

Accepted Answer

A)  Rate = k[Y]2[X] 
B)  Rate = k[Y][X]2 
C)  Rate = k[Y][X] 
D)  Rate = k[Y]2[X]2 
A)  Rate = k[Y]2[X] 
B)  Rate = k[Y][X]2 
C)  Rate = k[Y][X] 
D)  Rate = k[Y]2[X]2

Question 16

Which of the following is an exothermic reaction?

Accepted Answer

A)  burning propane gas in a barbecue 
B)  burning gasoline when driving a car 
C)  creating an explosion by detonating nitroglycerine 
D)  All of the above are exothermic reactions. 
A)  burning propane gas in a barbecue 
B)  burning gasoline when driving a car 
C)  creating an explosion by detonating nitroglycerine 
D)  All of the above are exothermic reactions.

Question 17

The order of the reaction with respect to A, B, and the total order respectively is ________. A + B → Products
Rate = k[A]3[B]0

Accepted Answer

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

Question 18

Which of the following statements regarding reaction mechanisms is true?

Accepted Answer

A)  A mechanism is a series of steps whereby reactants are converted to products. 
B)  Reaction mechanisms must be determined experimentally. 
C)  Neither A nor B is true. 
D)  Both A and B are true. 
A)  A mechanism is a series of steps whereby reactants are converted to products. 
B)  Reaction mechanisms must be determined experimentally. 
C)  Neither A nor B is true. 
D)  Both A and B are true.

Question 19

An exothermic reaction always leads to a release in energy.

Accepted Answer

A) True 
 B)False

Question 20

In a catalyzed reaction the activation energy is ________ when compared to the uncatalyzed reaction.

Accepted Answer

A)  identical 
B)  less 
C)  more 
D)  either less or more depending on the reaction 
A)  identical 
B)  less 
C)  more 
D)  either less or more depending on the reaction

The rate is second order with respect to the reactant and second order overall. Rate = k[A]2

The following data was obtained at 20 °C. X (g) → Y (g) The rate law for this reaction is ________.

The following data was obtained at 20 °C. 2W (g) → V (g) The rate law for this reaction is ________.

The greater the concentration of the reactants, the greater the rate of the reaction.

Knowing the mechanism of a reaction is advantageous because one may influence its rate to make the reaction useful.

Reaction rates can be varied by changing either the concentrations of the reacting species or the temperature at which the reaction is carried out.

Consider the reaction A → B with the following data: Energy of reactants = 50 kJ/mole; Energy of products = 70 kJ/mole; Energy of transition state = 80 kJ/mole. The reaction is , has a heat of reaction of kJ/mole, and the energy of activation is kJ/mole.

If the reaction has a negative overall energy change, then ________.

Which of the following represents a reaction coordinate diagram for a chemical reaction whose ΔErxn = 0?

Match the rate of each reaction with the overall order . -Rate = k[A]2[B]-1

Based on the collision theory, decreasing temperature for a reaction increases the reaction rate.

The rate determining step is always the fastest step.

Examine this reaction coordinate diagram, and answer the questions that follow. a) Estimate the value for the activation energy for this reaction. b) Calculate ΔErxn. c) Is this reaction exothermic or endothermic?

Consider the reaction X → Y with the following data: Energy of reactants = 25 kJ/mole; Energy of products = 75 kJ/mole; Energy of transition state = 100 kJ/mole. The energy of activation for the reverse reaction is ________ kJ/mole.

The following data was obtained at 100 °C. 2 Y (g) + X (g) → Z (g) The rate law for this reaction is ________..

Which of the following is an exothermic reaction?

The order of the reaction with respect to A, B, and the total order respectively is ________. A + B → Products Rate = k[A]3[B]0

Which of the following statements regarding reaction mechanisms is true?

An exothermic reaction always leads to a release in energy.

In a catalyzed reaction the activation energy is ________ when compared to the uncatalyzed reaction.

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Exam 13: When Reactants Turn Into Products

The rate is second order with respect to the reactant and second order overall. Rate = k[A]2

The following data was obtained at 20 °C. X (g) → Y (g) The rate law for this reaction is ________.

The following data was obtained at 20 °C. 2W (g) → V (g) The rate law for this reaction is ________.

The greater the concentration of the reactants, the greater the rate of the reaction.

Knowing the mechanism of a reaction is advantageous because one may influence its rate to make the reaction useful.

Reaction rates can be varied by changing either the concentrations of the reacting species or the temperature at which the reaction is carried out.

Consider the reaction A → B with the following data: Energy of reactants = 50 kJ/mole; Energy of products = 70 kJ/mole; Energy of transition state = 80 kJ/mole. The reaction is ________, has a heat of reaction of ________ kJ/mole, and the energy of activation is ________ kJ/mole.

If the reaction has a negative overall energy change, then ________.

Which of the following represents a reaction coordinate diagram for a chemical reaction whose ΔErxn = 0?

Match the rate of each reaction with the overall order . -Rate = k[A]2[B]-1

Based on the collision theory, decreasing temperature for a reaction increases the reaction rate.

The rate determining step is always the fastest step.

Examine this reaction coordinate diagram, and answer the questions that follow. a) Estimate the value for the activation energy for this reaction. b) Calculate ΔErxn. c) Is this reaction exothermic or endothermic?

Consider the reaction X → Y with the following data: Energy of reactants = 25 kJ/mole; Energy of products = 75 kJ/mole; Energy of transition state = 100 kJ/mole. The energy of activation for the reverse reaction is ________ kJ/mole.

The following data was obtained at 100 °C. 2 Y (g) + X (g) → Z (g) The rate law for this reaction is ________..

Which of the following is an exothermic reaction?

The order of the reaction with respect to A, B, and the total order respectively is ________. A + B → Products Rate = k[A]3[B]0

Which of the following statements regarding reaction mechanisms is true?

An exothermic reaction always leads to a release in energy.

In a catalyzed reaction the activation energy is ________ when compared to the uncatalyzed reaction.

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Consider the reaction A → B with the following data: Energy of reactants = 50 kJ/mole; Energy of products = 70 kJ/mole; Energy of transition state = 80 kJ/mole. The reaction is , has a heat of reaction of kJ/mole, and the energy of activation is kJ/mole.