Question 1

​ List the assumptions on which reaction mechanisms are based.

Accepted Answer

Reaction mechanisms are based on the fol

Question 2

The equilibrium constants for a series of reaction of the general type: AB + CD   AD + BC
Were measured and are shown below.  In which reaction is the concentration of the products the largest at equilibrium?

Accepted Answer

A)    
B)    
C) 0.011 
D) 1.2 
A)    
B)    
C) 0.011 
D) 1.2

Question 3

Which statement is a correct application of Le Châtelier's principle?

Accepted Answer

A) Addition of a substance to the left side of an equilibrium shifts it to the right. 
B) Any stress to the right side of a chemical equilibrium results in a shift to the left to relieve the stress. 
C) Heat added or taken away from a chemical equilibrium in which one side is exothermic will not shift the reaction. 
D) Any stress to the right side of a chemical equilibrium results in a shift to the left side to relieve the stress, and heat added or taken away from a chemical equilibrium in which one side is exothermic will not shift the reaction. 
A) Addition of a substance to the left side of an equilibrium shifts it to the right. 
B) Any stress to the right side of a chemical equilibrium results in a shift to the left to relieve the stress. 
C) Heat added or taken away from a chemical equilibrium in which one side is exothermic will not shift the reaction. 
D) Any stress to the right side of a chemical equilibrium results in a shift to the left side to relieve the stress, and heat added or taken away from a chemical equilibrium in which one side is exothermic will not shift the reaction.

Question 4

An inhibitor will have what effect on a reaction?

Accepted Answer

A) increase the activation energy 
B) lower the activation energy 
C) slow the reaction down 
D) lower the amount of product produced 
A) increase the activation energy 
B) lower the activation energy 
C) slow the reaction down 
D) lower the amount of product produced

Question 5

A heterogeneous catalyst will normally dissolve in the reaction mixture.

Accepted Answer

A) True 
 B)False

Question 6

Enthalpy always increases with increasing randomness.

Accepted Answer

A) True 
 B)False

Question 7

Equilibrium: The following question(s)refer to the equilibrium given below in which all reactants and products are gases.
CH4 + H2O   CH3OH + H2 + heat
Indicate the effect of the changing condition on the position of equilibrium.
Refer to Equilibrium. Add CH4 to the mixture.

Accepted Answer

A) shifts left 
B) shifts right 
C) no effect 
D) can shift to right or left 
A) shifts left 
B) shifts right 
C) no effect 
D) can shift to right or left

Question 8

All chemical reactions require at least some amount of activation energy to proceed.

Accepted Answer

A) True 
 B)False

Question 9

If we add a catalyst to the following equation, which way will the equilibrium shift? CO + H2O + heat   CO2 + H2

Accepted Answer

A) to the left 
B) will have no effect 
C) to the right 
D) not enough information. 
A) to the left 
B) will have no effect 
C) to the right 
D) not enough information.

Question 10

Which of the following statements about a K of 3.5 calculated for a specific chemical reaction at equilibrium is incorrect?

Accepted Answer

A) It was calculated by dividing the product of the products by that of the reactants. 
B) It indicates that one side of the reaction has most of the matter present. 
C) It is an evaluation of the extent of the two chemical reactions involved: the forward and the reverse reactions. 
D) A K of 3.5 indicates that a catalyst will push the reaction to the right. 
A) It was calculated by dividing the product of the products by that of the reactants. 
B) It indicates that one side of the reaction has most of the matter present. 
C) It is an evaluation of the extent of the two chemical reactions involved: the forward and the reverse reactions. 
D) A K of 3.5 indicates that a catalyst will push the reaction to the right.

Question 11

When a spontaneous process in accompanied by an energy increase, then a large entropy increase must also occur.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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 14

If we remove CO2 from the following equation, which way will the equilibrium shift? CO + H2O + heat     CO2 + H2

Accepted Answer

A) to the left 
B) will have no effect 
C) to the right 
D) not enough information 
A) to the left 
B) will have no effect 
C) to the right 
D) not enough information

Question 15

​ Which of the following is true of the influence of changes in energy and entropy on the spontaneity of a process?

Accepted Answer

A) A process will always be spontaneous if there is an increase in both the energy and the entropy. 
B) A process will always be spontaneous if the energy decreases and the entropy increases. 
C) A process accompanied by an entropy increase must also be accompanied by an energy decrease. 
D) A process accompanied by an entropy decrease must also be accompanied by an energy increase. 
A) A process will always be spontaneous if there is an increase in both the energy and the entropy. 
B) A process will always be spontaneous if the energy decreases and the entropy increases. 
C) A process accompanied by an entropy increase must also be accompanied by an energy decrease. 
D) A process accompanied by an entropy decrease must also be accompanied by an energy increase.

Question 16

Equilibrium: The following question(s)refer to the equilibrium given below in which all reactants and products are gases.
CH4 + H2O   CH3OH + H2 + heat
Indicate the effect of the changing condition on the position of equilibrium.
Refer to Equilibrium. Cool the mixture.

Accepted Answer

A) shifts left 
B) shifts right 
C) no effect 
D) can shift to right or left 
A) shifts left 
B) shifts right 
C) no effect 
D) can shift to right or left

Question 17

For the reaction below, which of the following would take place once pure A and B are mixed together? A + B   C

Accepted Answer

A) The concentration of C would increase for a time, then remain constant. 
B) The concentration of A would increase for a time, then decrease. 
C) The concentration of B would increase for a time, then remain constant. 
D) More than one response is correct. 
A) The concentration of C would increase for a time, then remain constant. 
B) The concentration of A would increase for a time, then decrease. 
C) The concentration of B would increase for a time, then remain constant. 
D) More than one response is correct.

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

An elderly person comes to you on a winter day with blue fingers and toes, sluggish movement, and slurred speech. What condition do they most likely have?

Accepted Answer

A) hyperthermia 
B) hypothermia 
C) heat exhaustion 
D) none of the choices 
A) hyperthermia 
B) hypothermia 
C) heat exhaustion 
D) none of the choices

Question 20

A reaction will occur each time two reactant molecules collide.

Accepted Answer

A) True 
 B)False

Exam 8: Reaction Rates and Equilibrium

​ List the assumptions on which reaction mechanisms are based.

The equilibrium constants for a series of reaction of the general type: AB + CD AD + BC Were measured and are shown below. In which reaction is the concentration of the products the largest at equilibrium?

Which statement is a correct application of Le Châtelier's principle?

An inhibitor will have what effect on a reaction?

A heterogeneous catalyst will normally dissolve in the reaction mixture.

Enthalpy always increases with increasing randomness.

Equilibrium: The following question(s)refer to the equilibrium given below in which all reactants and products are gases. CH4 + H2O CH3OH + H2 + heat Indicate the effect of the changing condition on the position of equilibrium. Refer to Equilibrium. Add CH4 to the mixture.

All chemical reactions require at least some amount of activation energy to proceed.

If we add a catalyst to the following equation, which way will the equilibrium shift? CO + H2O + heat CO2 + H2

Which of the following statements about a K of 3.5 calculated for a specific chemical reaction at equilibrium is incorrect?

When a spontaneous process in accompanied by an energy increase, then a large entropy increase must also occur.

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

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?

If we remove CO2 from the following equation, which way will the equilibrium shift? CO + H2O + heat CO2 + H2

​ Which of the following is true of the influence of changes in energy and entropy on the spontaneity of a process?

Equilibrium: The following question(s)refer to the equilibrium given below in which all reactants and products are gases. CH4 + H2O CH3OH + H2 + heat Indicate the effect of the changing condition on the position of equilibrium. Refer to Equilibrium. Cool the mixture.

For the reaction below, which of the following would take place once pure A and B are mixed together? A + B C

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

An elderly person comes to you on a winter day with blue fingers and toes, sluggish movement, and slurred speech. What condition do they most likely have?

A reaction will occur each time two reactant molecules collide.

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

List the assumptions on which reaction mechanisms are based.

Equilibrium: The following question(s)refer to the equilibrium given below in which all reactants and products are gases. CH₄ + H₂O CH₃OH + H₂ + heat Indicate the effect of the changing condition on the position of equilibrium. Refer to Equilibrium. Add CH₄ to the mixture.

If we add a catalyst to the following equation, which way will the equilibrium shift? CO + H₂O + heat CO₂ + H₂

If we remove CO₂ from the following equation, which way will the equilibrium shift? CO + H₂O + heat CO₂ + H₂

Which of the following is true of the influence of changes in energy and entropy on the spontaneity of a process?

Equilibrium: The following question(s)refer to the equilibrium given below in which all reactants and products are gases. CH₄ + H₂O CH₃OH + H₂ + heat Indicate the effect of the changing condition on the position of equilibrium. Refer to Equilibrium. Cool the mixture.