Question 1

Which of the following is most closely related to the term "reaction rate"?

Accepted Answer

A) the temperature needed to initiate a reaction 
B) the position of equilibrium when a reaction stops 
C) the speed of a reaction 
D) more than one response is correct 
A) the temperature needed to initiate a reaction 
B) the position of equilibrium when a reaction stops 
C) the speed of a reaction 
D) more than one response is correct

Question 2

A reaction will occur each time two reactant molecules collide.

Accepted Answer

A) True 
 B)False

Question 3

The device used to measure heat produced or used by a chemical reaction is called a(n)_____ .

Accepted Answer

A) thermometer 
B) calorimeter 
C) activator 
D) joulery 
A) thermometer 
B) calorimeter 
C) activator 
D) joulery

Question 4

A reaction rate can be described using any unit of time (seconds,hours,etc.).

Accepted Answer

A) True 
 B)False

Question 5

Which statement applies to a reaction at equilibrium?

Accepted Answer

A) The energy of activation has been supplied to bring the reaction to equilibrium. 
B) The state of the equilibrium can be expressed as a ratio. 
C) There are equal amounts of matter on either side of the reaction. 
D) All of the responses are correct. 
A) The energy of activation has been supplied to bring the reaction to equilibrium. 
B) The state of the equilibrium can be expressed as a ratio. 
C) There are equal amounts of matter on either side of the reaction. 
D) All of the responses are correct.

Question 6

Which statement is incorrect with reference to Le Châtelier's principle?

Accepted Answer

A) In a reaction of the type,Q + 2R   3T,the addition of one mole of Q results in the tripling of T. 
B) If the reaction to the right is exothermic,the reaction to the left must be endothermic. 
C) If the reaction rate of the forward reaction is known,then the reaction rate of the reverse reaction is also known. 
D) Responses b and c are incorrect. 
A) In a reaction of the type,Q + 2R   3T,the addition of one mole of Q results in the tripling of T. 
B) If the reaction to the right is exothermic,the reaction to the left must be endothermic. 
C) If the reaction rate of the forward reaction is known,then the reaction rate of the reverse reaction is also known. 
D) Responses b and c are incorrect.

Question 7

Reaction rates are determined experimentally.

Accepted Answer

A) True 
 B)False

Question 8

For the following energy diagram,which letter represents the catalyzed activation energy?

Accepted Answer

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

Question 9

Which of the following is NOT true regarding a chemical reaction?

Accepted Answer

A) All matter is considered to be composed of tiny particles. 
B) All particles contain potential energy,measured by constant motion. 
C) Particle speed always increases with rising temperature. 
D) Colliding particles will transfer energy with no loss in system energy. 
A) All matter is considered to be composed of tiny particles. 
B) All particles contain potential energy,measured by constant motion. 
C) Particle speed always increases with rising temperature. 
D) Colliding particles will transfer energy with no loss in system energy.

Question 10

What would be the effect of doubling the pressure on the following equilibrium system? N2(g)+ 3F2(g)   2NF3(g)

Accepted Answer

A) Shift it to the right. 
B) Shift it to the left. 
C) Will have no effect. 
D) Will be impossible to predict. 
A) Shift it to the right. 
B) Shift it to the left. 
C) Will have no effect. 
D) Will be impossible to predict.

Question 11

In a system of equilibrium,it is true that the rate of the forward reaction

Accepted Answer

A) exceeds that of the reverse. 
B) is lower than that of the reverse reaction. 
C) is equal to the rate of the reverse reaction. 
D) More than one response is correct. 
A) exceeds that of the reverse. 
B) is lower than that of the reverse reaction. 
C) is equal to the rate of the reverse reaction. 
D) More than one response is correct.

Question 12

If heat is absorbed when a compound dissolves in water,the compound should be more soluble at higher temperatures.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following will influence all reaction rates?

Accepted Answer

A) the presence of catalysts 
B) the temperature of reactants 
C) the concentration of reactants 
D) more than one response is correct 
A) the presence of catalysts 
B) the temperature of reactants 
C) the concentration of reactants 
D) more than one response is correct

Question 14

A spontaneous process accompanied by an entropy decrease must also be accompanied by an energy decrease.

Accepted Answer

A) True 
 B)False

Question 15

Reactions that have a low energy of activation tend to proceed at a high rate.

Accepted Answer

A) True 
 B)False

Question 16

Sulfur reacts with oxygen to produce sulfur dioxide,but only if the high activation energy is supplied.Which condition will lower the activation energy the most?

Accepted Answer

A) stirring the mixture 
B) heating the mixture 
C) using a catalyst 
D) activation energy cannot be lowered 
A) stirring the mixture 
B) heating the mixture 
C) using a catalyst 
D) activation energy cannot be lowered

Question 17

A patient complains about having painful muscle spasms after working on a very hot day.The patient's skin is moist and cool,heart rate is near normal as well as his/her body temperature.What should you not do for them?

Accepted Answer

A) get them to a cool place 
B) give them a caffeinated drink 
C) sponge them with cool water 
D) encourage them to lie down and rest 
A) get them to a cool place 
B) give them a caffeinated drink 
C) sponge them with cool water 
D) encourage them to lie down and rest

Question 18

Which of the following is the proper equilibrium expression for the reaction shown below? 2A + B   C + heat

Accepted Answer

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

Question 19

CFC's are in the environment because they were released into the atmosphere.What was the use of CFC's?

Accepted Answer

A) These are Chlorine-Fluorine Chain compounds used to purify the water. 
B) CFC's were used in pressurized cans that dispersed hair spray,paint,and other sprayed materials. 
C) CFC's had a use in the manufacture of steel and were released to the atmosphere by large industry. 
D) There is more than one correct response. 
A) These are Chlorine-Fluorine Chain compounds used to purify the water. 
B) CFC's were used in pressurized cans that dispersed hair spray,paint,and other sprayed materials. 
C) CFC's had a use in the manufacture of steel and were released to the atmosphere by large industry. 
D) There is more than one correct response.

Question 20

The reaction below does not progress at room temperature,but does at 1100$\degree$C.Therefore,this reaction is spontaneous at 1100$\degree$C.

Accepted Answer

A) True 
 B)False

Exam 8: Reaction Rates and Equilibrium

Which of the following is most closely related to the term "reaction rate"?

A reaction will occur each time two reactant molecules collide.

The device used to measure heat produced or used by a chemical reaction is called a(n)_____ .

A reaction rate can be described using any unit of time (seconds,hours,etc.).

Which statement applies to a reaction at equilibrium?

Which statement is incorrect with reference to Le Châtelier's principle?

Reaction rates are determined experimentally.

For the following energy diagram,which letter represents the catalyzed activation energy?

Which of the following is NOT true regarding a chemical reaction?

What would be the effect of doubling the pressure on the following equilibrium system? N2(g)+ 3F2(g) 2NF3(g)

In a system of equilibrium,it is true that the rate of the forward reaction

If heat is absorbed when a compound dissolves in water,the compound should be more soluble at higher temperatures.

Which of the following will influence all reaction rates?

A spontaneous process accompanied by an entropy decrease must also be accompanied by an energy decrease.

Reactions that have a low energy of activation tend to proceed at a high rate.

Sulfur reacts with oxygen to produce sulfur dioxide,but only if the high activation energy is supplied.Which condition will lower the activation energy the most?

A patient complains about having painful muscle spasms after working on a very hot day.The patient's skin is moist and cool,heart rate is near normal as well as his/her body temperature.What should you not do for them?

Which of the following is the proper equilibrium expression for the reaction shown below? 2A + B C + heat

CFC's are in the environment because they were released into the atmosphere.What was the use of CFC's?

The reaction below does not progress at room temperature,but does at 1100 °\degree° C.Therefore,this reaction is spontaneous at 1100 °\degree° C.

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

What would be the effect of doubling the pressure on the following equilibrium system? N₂(g)+ 3F₂(g) 2NF₃(g)

The reaction below does not progress at room temperature,but does at 1100 $\degree$ C.Therefore,this reaction is spontaneous at 1100 $\degree$ C. $The reaction below does not progress at room temperature,but does at 1100 \degree C.Therefore,this reaction is spontaneous at 1100 \degree C.$