Question 1

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)  jouleryE) A) and B)
F) B) and D)

Question 2

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 .E) A) and B)
F) B) and C)

Question 3

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

Accepted Answer

A)  activation energy
B)  surface energy
C)  internal energy
D)  elastic potential energyE) None of the above
F) All of the above

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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 theseE) A) and B)
F) None of the above

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Which of the following is an endergonic process?

Accepted Answer

A)  exothermic reactions
B)  endothermic reactions
C)  equilibrium reactions
D)  none of themE) B) and C)
F) A) and B)

Question 10

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 knownE) B) and D)
F) A) and B)

Question 11

Which of the following would be the equilibrium expression for the system given below? N2(g) + 3F2(g)  2(g) + 3F2(g)    2NF3(g)  A)    B)    C)    D)   " class="answers-bank-image d-inline" rel="preload" > 2NF3(g)

Accepted Answer

A)   2(g) + 3F2(g)    2NF3(g)  
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
B)   2(g) + 3F2(g)    2NF3(g)  
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
C)   2(g) + 3F2(g)    2NF3(g)  
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
D)   2(g) + 3F2(g)    2NF3(g)  
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >E) All of the above
F) B) and D)

Question 12

Which of the statements is correct when referring to the following reaction? H2(g) + I2(g)  2(g) + I2(g)    2HI(g)  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." class="answers-bank-image d-inline" rel="preload" > 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 2(g) + I2(g)    2HI(g)  
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." class="answers-bank-image d-inline" rel="preload" > .
C)  Most of the matter is on the right side of the equation.
D)  There isn't a correct response provided.E) A) and B)
F) A) and C)

Question 13

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

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) B) and C)
F) C) and D)

Question 14

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 15

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

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) B) and C)
F) A) and D)

Question 16

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 17

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.E) A) and B)
F) None of the above

Question 18

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 allE) All of the above
F) B) and D)

Question 19

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

Accepted Answer

A)  lower
B)  equal
C)  higher
D)  can not tellE) A) and C)
F) None of the above

Question 20

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.E) B) and C)
F) None of the above

Exam 8: Reaction Rates and Equilibrium

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

Correct Answer
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The energy associated with vibrations within molecules is called _____.

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

Correct Answer
verified

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

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

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Which statement applies to a reaction at equilibrium?

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
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Which of the following is an endergonic process?

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

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

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

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

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

Correct Answer
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In an exergonic process, the system _____ .

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

Correct Answer
verified

Exam 8: Reaction Rates and Equilibrium

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which statement applies to a reaction at equilibrium?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

Which of the following is an endergonic process?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In an exergonic process, the system _____ .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

The energy associated with vibrations within molecules is called _____.

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

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

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

Correct Answer
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Correct Answer
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Correct Answer
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