Question 1

The overall order is ________. Rate = k[A]3[B]-1

Accepted Answer

A)  -1 
B)  0 
C)  2 
D)  3 
A)  -1 
B)  0 
C)  2 
D)  3

Question 2

Which statement is true about the reaction energy profile?

Accepted Answer

A)  plots the relative energies of both the reactants and products 
B)  plots energy on the y-axis 
C)  traces the progress of the reaction on the x-axis 
D)  All of the above are true. 
A)  plots the relative energies of both the reactants and products 
B)  plots energy on the y-axis 
C)  traces the progress of the reaction on the x-axis 
D)  All of the above are true.

Question 3

Which of the following factors could increase the reaction rate? 2A + B2 → 2AB
(I) decreasing the temperature
(II) adding a catalyst
(III) increasing the surface area of solid reactants

Accepted Answer

A)  I and II 
B)  I, II, and III 
C)  I and III 
D)  II and III 
E)  III only 
A)  I and II 
B)  I, II, and III 
C)  I and III 
D)  II and III 
E)  III only

Question 4

Calculate a value for ΔErxn for a chemical reaction if the reactants have an energy of -400 kJ/mol and the products have an energy of +100 kJ/mol. Is this reaction exothermic or endothermic?

Accepted Answer

+500 kJ/mo

Question 5

In each of the following diagrams, the x-axis is the reaction coordinate and the y-axis is the potential energy. Which diagram corresponds to a reaction that has an activation energy of 35 kJ and an overall reaction energy of -110 kJ?

Accepted Answer

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

Question 6

Which of the following responses contains the two rate factors that comprise the rate constant (k) for a given chemical reaction?

Accepted Answer

A)  the temperature and the number of collisions per unit volume 
B)  the number of collisions per unit volume and the fraction of collisions with a favorable orientation 
C)  the number of collisions with energy greater than the activation energy and the fraction of collisions with a favorable orientation 
D)  the number of collisions with energy greater than the activation energy and the temperature 
A)  the temperature and the number of collisions per unit volume 
B)  the number of collisions per unit volume and the fraction of collisions with a favorable orientation 
C)  the number of collisions with energy greater than the activation energy and the fraction of collisions with a favorable orientation 
D)  the number of collisions with energy greater than the activation energy and the temperature

Question 7

The rate of a reaction may be increased by ________.

Accepted Answer

A)  increasing the concentration of reactants 
B)  increasing the temperature 
C)  adding a catalyst 
D)  all of the above 
A)  increasing the concentration of reactants 
B)  increasing the temperature 
C)  adding a catalyst 
D)  all of the above

Question 8

The following data was obtained at 100 °C. 2Y (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]3[X] 
D)  Rate = k[Y]3[X]0 
A)  Rate = k[Y]2[X] 
B)  Rate = k[Y][X]2 
C)  Rate = k[Y]3[X] 
D)  Rate = k[Y]3[X]0

Question 9

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

Accepted Answer

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

Question 10

Which of the following is not true when the temperature of the reaction mixture is decreased?

Accepted Answer

A)  The average kinetic energy of both the reactant and product molecules is decreased. 
B)  The rate of the reaction is decreased. 
C)  The fraction of reactant molecules that have a low kinetic energies is increased. 
D)  The activation energy of the reaction is increased. 
A)  The average kinetic energy of both the reactant and product molecules is decreased. 
B)  The rate of the reaction is decreased. 
C)  The fraction of reactant molecules that have a low kinetic energies is increased. 
D)  The activation energy of the reaction is increased.

Question 11

Which of the following is not a term involved in determining the overall rate of a chemical reaction?

Accepted Answer

A)  the total number of collisions per unit time 
B)  the total number of collisions in the gas phase 
C)  the fraction of collisions with energy greater than the activation energy 
D)  the fraction of collisions which occur with a favorable orientation 
A)  the total number of collisions per unit time 
B)  the total number of collisions in the gas phase 
C)  the fraction of collisions with energy greater than the activation energy 
D)  the fraction of collisions which occur with a favorable orientation

Question 12

The value of Ea(reaction) is equal to the difference Ea(reactants) - Ea(products).

Accepted Answer

A) True 
 B)False

Question 13

If the concentration of A is doubled while the concentration of B is unchanged, the rate will ________. A (g) + 3 B (g) → C (g) + 2 D (g)
Rate = k[A][B]3

Accepted Answer

A)  stay the same 
B)  be reduced by a factor of 8 
C)  double 
D)  be increased by a factor of 8 
A)  stay the same 
B)  be reduced by a factor of 8 
C)  double 
D)  be increased by a factor of 8

Question 14

Which of the following "adjustments" can be made to a chemical reaction system to increase the rate of reaction?

Accepted Answer

A)  increase the reaction temperature 
B)  increase the concentrations of the reactants 
C)  add a catalyst 
D)  All of the above will increase the rate of reaction. 
E)  None of the above will increase the rate of reaction. 
A)  increase the reaction temperature 
B)  increase the concentrations of the reactants 
C)  add a catalyst 
D)  All of the above will increase the rate of reaction. 
E)  None of the above will increase the rate of reaction.

Question 15

Which of the following reaction coordinate diagrams represents a chemical reaction that is exothermic?

Accepted Answer

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

Question 16

The reactants must collide with an energy greater than the energy of activation for the reaction to occur.

Accepted Answer

A) True 
 B)False

Question 17

Match the rate of each reaction with the overall order .
-Rate = k[A][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 18

The reaction: HCl + NaOH → H₂O + NaCl is a substitution reaction.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is true about the activation energy?

Accepted Answer

A)  It may increase by decreasing the temperature. 
B)  It may decrease by decreasing the temperature. 
C)  It may increase by increasing the concentration of reactants. 
D)  It is practically independent of both temperature and concentration of reactants. 
A)  It may increase by decreasing the temperature. 
B)  It may decrease by decreasing the temperature. 
C)  It may increase by increasing the concentration of reactants. 
D)  It is practically independent of both temperature and concentration of reactants.

Question 20

The fraction of collisions with the proper orientation depends on ________.

Accepted Answer

A)  the strength of the bonds that are to be broken 
B)  the molecular shape of the molecule 
C)  the concentration 
D)  both A and B 
A)  the strength of the bonds that are to be broken 
B)  the molecular shape of the molecule 
C)  the concentration 
D)  both A and B

The overall order is ________. Rate = k[A]3[B]-1

Which statement is true about the reaction energy profile?

Which of the following factors could increase the reaction rate? 2A + B2 → 2AB (I) decreasing the temperature (II) adding a catalyst (III) increasing the surface area of solid reactants

Calculate a value for ΔErxn for a chemical reaction if the reactants have an energy of -400 kJ/mol and the products have an energy of +100 kJ/mol. Is this reaction exothermic or endothermic?

In each of the following diagrams, the x-axis is the reaction coordinate and the y-axis is the potential energy. Which diagram corresponds to a reaction that has an activation energy of 35 kJ and an overall reaction energy of -110 kJ?

Which of the following responses contains the two rate factors that comprise the rate constant (k) for a given chemical reaction?

The rate of a reaction may be increased by ________.

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

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

Which of the following is not true when the temperature of the reaction mixture is decreased?

Which of the following is not a term involved in determining the overall rate of a chemical reaction?

The value of Ea(reaction) is equal to the difference Ea(reactants) - Ea(products).

If the concentration of A is doubled while the concentration of B is unchanged, the rate will ________. A (g) + 3 B (g) → C (g) + 2 D (g) Rate = k[A][B]3

Which of the following "adjustments" can be made to a chemical reaction system to increase the rate of reaction?

Which of the following reaction coordinate diagrams represents a chemical reaction that is exothermic?

The reactants must collide with an energy greater than the energy of activation for the reaction to occur.

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

The reaction: HCl + NaOH → H₂O + NaCl is a substitution reaction.

Which of the following is true about the activation energy?

The fraction of collisions with the proper orientation depends on ________.

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

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Exam 13: When Reactants Turn Into Products

The overall order is ________. Rate = k[A]3[B]-1

Which statement is true about the reaction energy profile?

Which of the following factors could increase the reaction rate? 2A + B2 → 2AB (I) decreasing the temperature (II) adding a catalyst (III) increasing the surface area of solid reactants

Calculate a value for ΔErxn for a chemical reaction if the reactants have an energy of -400 kJ/mol and the products have an energy of +100 kJ/mol. Is this reaction exothermic or endothermic?

In each of the following diagrams, the x-axis is the reaction coordinate and the y-axis is the potential energy. Which diagram corresponds to a reaction that has an activation energy of 35 kJ and an overall reaction energy of -110 kJ?

Which of the following responses contains the two rate factors that comprise the rate constant (k) for a given chemical reaction?

The rate of a reaction may be increased by ________.

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

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

Which of the following is not true when the temperature of the reaction mixture is decreased?

Which of the following is not a term involved in determining the overall rate of a chemical reaction?

The value of Ea(reaction) is equal to the difference Ea(reactants) - Ea(products).

If the concentration of A is doubled while the concentration of B is unchanged, the rate will ________. A (g) + 3 B (g) → C (g) + 2 D (g) Rate = k[A][B]3

Which of the following "adjustments" can be made to a chemical reaction system to increase the rate of reaction?

Which of the following reaction coordinate diagrams represents a chemical reaction that is exothermic?

The reactants must collide with an energy greater than the energy of activation for the reaction to occur.

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

The reaction: HCl + NaOH → H₂O + NaCl is a substitution reaction.

Which of the following is true about the activation energy?

The fraction of collisions with the proper orientation depends on ________.

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