Question 1

Which of the statements is correct when referring to the following reaction? H2(g)+ I2(g)   2HI(g)

Accepted Answer

A) This reaction is reversible because the amount of heat given off by the forward reaction is the same as the heat given off by the reverse reaction. 
B) The physical state of the reaction is found by using   . 
C) Most of the matter is on the right side of the equation. 
D) There isn't a correct response provided. 
A) This reaction is reversible because the amount of heat given off by the forward reaction is the same as the heat given off by the reverse reaction. 
B) The physical state of the reaction is found by using   . 
C) Most of the matter is on the right side of the equation. 
D) There isn't a correct response provided.

Question 2

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 3

Which of the following would be the equilibrium expression for the system given below? N2(g)+ 3F2(g)   2NF3(g)

Accepted Answer

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

Question 4

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) The reaction to the left is neither exothermic, nor is the reaction rate of the reverse reaction known 
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) The reaction to the left is neither exothermic, nor is the reaction rate of the reverse reaction known

Question 5

A process that gains or accepts energy as it takes place is a(n)_____ .

Accepted Answer

A) exergonic process 
B) spontaneous process 
C) endergonic process 
D) all of these 
A) exergonic process 
B) spontaneous process 
C) endergonic process 
D) all of these

Question 6

Butane, C4H10, burning in air, is an example of a substance combining with oxygen to produce CO2 and H2O. If pure oxygen were to be supplied, the rate of combustion would increase significantly. Then there is more energy given off when 10 g of butane burns in pure oxygen, rather than in air.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

​ The energy associated with vibrations within molecules is called _____.

Accepted Answer

A) activation energy 
B) surface energy 
C) internal energy 
D) elastic potential energy 
A) activation energy 
B) surface energy 
C) internal energy 
D) elastic potential energy

Question 9

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 10

Chemical reactions always occur once the molecules of two substances collide.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is an endergonic process?

Accepted Answer

A) exothermic reactions 
B) endothermic reactions 
C) equilibrium reactions 
D) none of them 
A) exothermic reactions 
B) endothermic reactions 
C) equilibrium reactions 
D) none of them

Question 12

For the following reaction, which of the given changes will increase the value of the equilibrium constant? AB + CD   AD + BC + heat

Accepted Answer

A) decreasing the temperature 
B) adding AB to the reaction 
C) removing CD from the reaction 
D) All of these changes will increase K . 
A) decreasing the temperature 
B) adding AB to the reaction 
C) removing CD from the reaction 
D) All of these changes will increase K .

Question 13

In an exergonic process, the system _____ .

Accepted Answer

A) gains energy 
B) loses energy 
C) either gains or loses energy 
D) no energy change at all 
A) gains energy 
B) loses energy 
C) either gains or loses energy 
D) no energy change at all

Question 14

Based upon the energy diagram given below, which letter represents the enthalpy for the reaction?

Accepted Answer

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

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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 17

For the reaction  NO2 (g)  +  N2O(g)       3 NO(g)the equilibrium constant expression is:

Accepted Answer

A) True 
 B)False

Question 18

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 19

Ice has a(n)____ entropy than that of liquid water.

Accepted Answer

A) lower 
B) equal 
C) higher 
D) can not tell 
A) lower 
B) equal 
C) higher 
D) can not tell

Question 20

Increasing the concentration of a reactant will increase the number of effective collisions.

Accepted Answer

A) True 
 B)False

Exam 8: Reaction Rates and Equilibrium

Which of the statements is correct when referring to the following reaction? H2(g)+ I2(g) 2HI(g)

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

Which of the following would be the equilibrium expression for the system given below? N2(g)+ 3F2(g) 2NF3(g)

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

A process that gains or accepts energy as it takes place is a(n)_____ .

Butane, C4H10, burning in air, is an example of a substance combining with oxygen to produce CO2 and H2O. If pure oxygen were to be supplied, the rate of combustion would increase significantly. Then there is more energy given off when 10 g of butane burns in pure oxygen, rather than in air.

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

​ The energy associated with vibrations within molecules is called _____.

Which statement applies to a reaction at equilibrium?

Chemical reactions always occur once the molecules of two substances collide.

Which of the following is an endergonic process?

For the following reaction, which of the given changes will increase the value of the equilibrium constant? AB + CD AD + BC + heat

In an exergonic process, the system _____ .

Based upon the energy diagram given below, which letter represents the enthalpy for the reaction?

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

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

For the reaction NO2 (g) + N2O(g) 3 NO(g)the equilibrium constant expression is:

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

Ice has a(n)____ entropy than that of liquid water.

Increasing the concentration of a reactant will increase the number of effective collisions.

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

Which of the statements is correct when referring to the following reaction? H₂(g)+ I₂(g) 2HI(g)

Which of the following would be the equilibrium expression for the system given below? N₂(g)+ 3F₂(g) 2NF₃(g)

The energy associated with vibrations within molecules is called _____.

For the reaction NO₂ (g) + N₂O(g) 3 NO(g)the equilibrium constant expression is: