Question 1

In the following equation 2W (g)→ V (g)at 20 °C the following data were obtained:   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 2

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

Accepted Answer

A) True 
 B)False

Question 3

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 4

Generally in a biochemical reaction the first step involves ________.

Accepted Answer

A) the reaction of the enzyme with the active site of the substrate 
B) the reaction of the substrate with the active site of the enzyme 
C) the reaction of the substrate with the enzyme-substrate complex 
D) the reaction of the enzyme with the enzyme-substrate complex 
A) the reaction of the enzyme with the active site of the substrate 
B) the reaction of the substrate with the active site of the enzyme 
C) the reaction of the substrate with the enzyme-substrate complex 
D) the reaction of the enzyme with the enzyme-substrate complex

Question 5

An endothermic reaction usually leads to cooling.

Accepted Answer

A) True 
 B)False

Question 6

The slow step in the multistep mechanism of a reaction ________.

Accepted Answer

A) controls the rate at which the products are formed 
B) is the only step that involves the breaking of bonds 
C) is equally significant in measuring the rate 
D) is insignificant in the formation of products 
A) controls the rate at which the products are formed 
B) is the only step that involves the breaking of bonds 
C) is equally significant in measuring the rate 
D) is insignificant in the formation of products

Question 7

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 8

Adding a catalyst increases the rate of reaction by providing the additional energy needed to overcome a large energy of activation.

Accepted Answer

A) True 
 B)False

Question 9

A lower energy of activation leads to more products favored in the reaction.

Accepted Answer

A) True 
 B)False

Question 10

For an exothermic reaction, the value for ΔErxn is a negative number.

Accepted Answer

A) True 
 B)False

Question 11

Based on the collision theory, adding a catalyst to a reaction increases the reaction rate.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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 14

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 15

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)350 kJ/m

Question 16

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

Question 17

The reaction A + B + C → Products follows the rate law: Rate = - k[A]1[B]-1[C]2. The overall rate of this reaction is ________.

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
A) 2 
B) 3 
C) 4 
D) 5

Question 18

If the forward reaction is exothermic, the reverse is endothermic.

Accepted Answer

A) True 
 B)False

Question 19

When the heat of reaction is a positive number, the reaction is exothermic.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A) True 
 B)False

In the following equation 2W (g)→ V (g)at 20 °C the following data were obtained: The rate law for this reaction is ________.

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

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

Generally in a biochemical reaction the first step involves ________.

An endothermic reaction usually leads to cooling.

The slow step in the multistep mechanism of a reaction ________.

Which of the following is an exothermic reaction?

Adding a catalyst increases the rate of reaction by providing the additional energy needed to overcome a large energy of activation.

A lower energy of activation leads to more products favored in the reaction.

For an exothermic reaction, the value for ΔE_rxn is a negative number.

Based on the collision theory, adding a catalyst to a reaction increases the reaction rate.

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

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

Which of the following statements regarding reaction mechanisms is true?

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

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

The reaction A + B + C → Products follows the rate law: Rate = - k[A]¹[B]^-¹[C]². The overall rate of this reaction is ________.

If the forward reaction is exothermic, the reverse is endothermic.

When the heat of reaction is a positive number, the reaction is exothermic.

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

In the following equation 2W (g)→ V (g)at 20 °C the following data were obtained: The rate law for this reaction is ________.

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

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

Generally in a biochemical reaction the first step involves ________.

An endothermic reaction usually leads to cooling.

The slow step in the multistep mechanism of a reaction ________.

Which of the following is an exothermic reaction?

Adding a catalyst increases the rate of reaction by providing the additional energy needed to overcome a large energy of activation.

A lower energy of activation leads to more products favored in the reaction.

For an exothermic reaction, the value for ΔErxn is a negative number.

Based on the collision theory, adding a catalyst to a reaction increases the reaction rate.

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

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

Which of the following statements regarding reaction mechanisms is true?

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?

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

The reaction A + B + C → Products follows the rate law: Rate = - k[A]1[B]-1[C]2. The overall rate of this reaction is ________.

If the forward reaction is exothermic, the reverse is endothermic.

When the heat of reaction is a positive number, the reaction is exothermic.

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

For an exothermic reaction, the value for ΔE_rxn is a negative number.

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

The reaction A + B + C → Products follows the rate law: Rate = - k[A]¹[B]^-¹[C]². The overall rate of this reaction is ________.