Question 1

A reversible reaction in which K = 9.65 × 10-14 contains a negligible amount of reactants at equilibrium.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is NOT a reasonable assumption about the chemical reaction whose energy diagram is depicted below?

Accepted Answer

A)  The activation energy for the reaction is 100kJ.
B)  The reaction is exothermic.
C)   Δ\DeltaΔ H= -25kJ
D)  The reaction is favorable. E) A) and C)
F) A) and B)

Question 3

Increasing the temperature of a reaction mixture usually results in a decrease in the reaction rate.

Accepted Answer

A) True 
 B)False

Question 4

An equilibrium constant with a value of 8.0 × 106 indicates that at equilibrium

Accepted Answer

A)  the reactants are favored.
B)  the products are favored.
C)  approximately equal concentrations of reactants and products are present.
D)  there are more reactants present than products.E) A) and C)
F) B) and C)

Question 5

In the energy diagram shown below, C labels the _____.

Accepted Answer

The answer of In the energy diagram shown below, C...

Question 6

Once equilibrium is reached in a chemical reaction, reactants stop forming products.

Accepted Answer

A) True 
 B)False

Question 7

When heat is added to an exothermic equilibrium reaction, the reaction shifts to form more ____.

Accepted Answer

The answer of When heat is added to an exothermic...

Question 8

Which term correctly describes a reaction in which the energy of the products is higher than the energy of the reactants?

Accepted Answer

A)  oxidation-reduction
B)  endothermic
C)  exothermic
D)  combustionE) None of the above
F) B) and D)

Question 9

Consider the reaction: N2(g) + O2(g)  2(g) + O2(g)    2 NO(g) . If [N2] = 0.520 M, [O2] = 0.0662 M, and [NO] = 0.00956 at equilibrium, what is the value of K? A) 3.60 B) 0.278 C) 377 D) 0.00265" class="answers-bank-image d-inline" rel="preload" > 2 NO(g) . If [N2] = 0.520 M, [O2] = 0.0662 M, and [NO] = 0.00956 at equilibrium, what is the value of K?

Accepted Answer

A)  3.60
B)  0.278
C)  377
D)  0.00265E) A) and D)
F) None of the above

Question 10

One step in the metabolism of glucose is depicted below. Which statement best describes how the equilibrium system would respond if the amount of dihydroxyacetone phosphate is decreased?

Accepted Answer

A)  The system would shift to the left, consuming more dihydroxyacetone phosphate.
B)  The system would shift to the right, producing more dihydroxyacetone phosphate and glyceraldehyde 3-phosphate.
C)  The system would shift to the left, producing more fructose 1, 6-bisphosphate.
D)  The system would shift to the right, consuming some glyceraldehyde 3-phosphate and producing more dihydroxyacetone phosphate.E) B) and C)
F) B) and D)

Question 11

Le Châtelier's principle is a general rule used to explain the effect of a change in reaction conditions on equilibrium.

Accepted Answer

A) True 
 B)False

Question 12

Consider the reaction, C2H4(g) + H2(g)  →\rightarrow→ C2H6(g) , where  Δ\DeltaΔ H = -137 kJ. How many kilojoules are released when 55.3 g of C2H4 reacts?

Accepted Answer

A)  137 kJ are released
B)  270. kJ are released
C)  1.13 × 103 kJ are released
D)  7.58 × 103 kJ are released E) None of the above
F) B) and C)

Question 13

The expression for the equilibrium constant, K, for the general reaction: a A + b B  c C + d D is  .

Accepted Answer

A) True 
 B)False

Question 14

Bond dissociation energies are always positive numbers.

Accepted Answer

A) True 
 B)False

Question 15

The$\Delta$H for the reaction depicted by the energy diagram below is ____.

Accepted Answer

The answer of The$\Delta$H for the reaction depicted by the...

Question 16

Exothermic reactions involve the formation of products having lower energy than the reactants.

Accepted Answer

A) True 
 B)False

Question 17

Kinetic energy is the energy associated with movement; potential energy is the energy inherent in an object due to its position or composition.

Accepted Answer

A) True 
 B)False

Question 18

Consider the reaction: PCl3(g) + Cl2(g)  3(g) + Cl2(g)    PCl5(g) . If [PCl3] = 0.78 M, [Cl2] = 0.44 M, and [PCl5] = 0.88 at equilibrium, what is the value of K? A) 0.39 B) 1.4 C) 2.6 D) 0.72" class="answers-bank-image d-inline" rel="preload" > PCl5(g) . If [PCl3] = 0.78 M, [Cl2] = 0.44 M, and [PCl5] = 0.88 at equilibrium, what is the value of K?

Accepted Answer

A)  0.39
B)  1.4
C)  2.6
D)  0.72E) C) and D)
F) None of the above

Question 19

Which statement concerning the reversible reaction 2 NO2(g)  2(g)    N2O4(g) is true? A) NO2 is the product of the forward reaction. B) The reverse reaction produces N2O4. C) At the start of the reaction, the forward and reverse reaction rates are equal. D) As the forward reaction progresses and more N2O4 is formed, the reverse reaction rate increases." class="answers-bank-image d-inline" rel="preload" > N2O4(g) is true?

Accepted Answer

A)  NO2 is the product of the forward reaction.
B)  The reverse reaction produces N2O4.
C)  At the start of the reaction, the forward and reverse reaction rates are equal.
D)  As the forward reaction progresses and more N2O4 is formed, the reverse reaction rate increases.E) A) and B)
F) A) and C)

Question 20

Walking at a brisk pace burns off about 280 Cal/h. How long would you have to walk to burn off the Calories obtained from eating a candy bar that contained 3 g of protein, 12 g of fat, and 28 g of carbohydrates?

Accepted Answer

A)  55 minutes
B)  230 minutes
C)  50 minutes
D)  210 minutesE) None of the above
F) C) and D)

Exam 6: Energy Changes, Reaction Rates, and Equilibrium

One step in the metabolism of glucose is depicted below. Which statement best describes how the equilibrium system would respond if the amount of dihydroxyacetone phosphate is decreased?

Correct Answer
verified

Increasing the temperature of a reaction mixture usually results in a decrease in the reaction rate.

Correct Answer
verified

Le Châtelier's principle is a general rule used to explain the effect of a change in reaction conditions on equilibrium.

Correct Answer
verified

Correct Answer
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Which statement concerning the reversible reaction 2 NO₂(g) N₂O₄(g) is true?

Correct Answer
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Consider the reaction, C₂H₄(g) + H₂(g) $\rightarrow$ C₂H₆(g) , where $\Delta$ H = -137 kJ. How many kilojoules are released when 55.3 g of C₂H₄reacts?

Correct Answer
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Consider the reaction: N₂(g) + O₂(g) 2 NO(g) . If [N₂] = 0.520 M, [O₂] = 0.0662 M, and [NO] = 0.00956 at equilibrium, what is the value of K?

Correct Answer
verified

Kinetic energy is the energy associated with movement; potential energy is the energy inherent in an object due to its position or composition.

Correct Answer
verified

Once equilibrium is reached in a chemical reaction, reactants stop forming products.

Correct Answer
verified

Consider the reaction: PCl₃(g) + Cl₂(g) PCl₅(g) . If [PCl₃] = 0.78 M, [Cl₂] = 0.44 M, and [PCl₅] = 0.88 at equilibrium, what is the value of K?

Correct Answer
verified

An equilibrium constant with a value of 8.0 × 10⁶ indicates that at equilibrium

Correct Answer
verified

Exothermic reactions involve the formation of products having lower energy than the reactants.

Correct Answer
verified

Bond dissociation energies are always positive numbers.

Correct Answer
verified

A reversible reaction in which K = 9.65 × 10^-14 contains a negligible amount of reactants at equilibrium.

Correct Answer
verified

When heat is added to an exothermic equilibrium reaction, the reaction shifts to form more ____.

Correct Answer
verified

Walking at a brisk pace burns off about 280 Cal/h. How long would you have to walk to burn off the Calories obtained from eating a candy bar that contained 3 g of protein, 12 g of fat, and 28 g of carbohydrates?

Correct Answer
verified

The $\Delta$ H for the reaction depicted by the energy diagram below is . $The \Delta H for the reaction depicted by the energy diagram below is .$

Correct Answer
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In the energy diagram shown below, C labels the _____.

Correct Answer
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Which term correctly describes a reaction in which the energy of the products is higher than the energy of the reactants?

Correct Answer
verified

The expression for the equilibrium constant, K, for the general reaction: a A + b B c C + d D is .

Correct Answer
verified

Exam 6: Energy Changes, Reaction Rates, and Equilibrium

One step in the metabolism of glucose is depicted below. Which statement best describes how the equilibrium system would respond if the amount of dihydroxyacetone phosphate is decreased?

Correct AnswerverifiedShow Answer

Increasing the temperature of a reaction mixture usually results in a decrease in the reaction rate.

Correct AnswerverifiedShow Answer

Le Châtelier's principle is a general rule used to explain the effect of a change in reaction conditions on equilibrium.

Correct AnswerverifiedShow Answer

Which of the following is NOT a reasonable assumption about the chemical reaction whose energy diagram is depicted below?

Correct AnswerverifiedShow Answer

Which statement concerning the reversible reaction 2 NO2(g) N2O4(g) is true?

Correct AnswerverifiedShow Answer

Consider the reaction, C2H4(g) + H2(g) →\rightarrow→ C2H6(g) , where Δ\DeltaΔ H = -137 kJ. How many kilojoules are released when 55.3 g of C2H4 reacts?

Correct AnswerverifiedShow Answer

Consider the reaction: N2(g) + O2(g) 2 NO(g) . If [N2] = 0.520 M, [O2] = 0.0662 M, and [NO] = 0.00956 at equilibrium, what is the value of K?

Correct AnswerverifiedShow Answer

Kinetic energy is the energy associated with movement; potential energy is the energy inherent in an object due to its position or composition.

Correct AnswerverifiedShow Answer

Once equilibrium is reached in a chemical reaction, reactants stop forming products.

Correct AnswerverifiedShow Answer

Consider the reaction: PCl3(g) + Cl2(g) PCl5(g) . If [PCl3] = 0.78 M, [Cl2] = 0.44 M, and [PCl5] = 0.88 at equilibrium, what is the value of K?

Correct AnswerverifiedShow Answer

An equilibrium constant with a value of 8.0 × 106 indicates that at equilibrium

Correct AnswerverifiedShow Answer

Exothermic reactions involve the formation of products having lower energy than the reactants.

Correct AnswerverifiedShow Answer

Bond dissociation energies are always positive numbers.

Correct AnswerverifiedShow Answer

A reversible reaction in which K = 9.65 × 10-14 contains a negligible amount of reactants at equilibrium.

Correct AnswerverifiedShow Answer

When heat is added to an exothermic equilibrium reaction, the reaction shifts to form more ____.

Correct AnswerverifiedShow Answer

Walking at a brisk pace burns off about 280 Cal/h. How long would you have to walk to burn off the Calories obtained from eating a candy bar that contained 3 g of protein, 12 g of fat, and 28 g of carbohydrates?

Correct AnswerverifiedShow Answer

The Δ\DeltaΔ H for the reaction depicted by the energy diagram below is ____.

Correct AnswerverifiedShow Answer

In the energy diagram shown below, C labels the _____.

Correct AnswerverifiedShow Answer

Which term correctly describes a reaction in which the energy of the products is higher than the energy of the reactants?

Correct AnswerverifiedShow Answer

The expression for the equilibrium constant, K, for the general reaction: a A + b B c C + d D is .

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Which statement concerning the reversible reaction 2 NO₂(g) N₂O₄(g) is true?

Correct Answer
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Consider the reaction, C₂H₄(g) + H₂(g) $\rightarrow$ C₂H₆(g) , where $\Delta$ H = -137 kJ. How many kilojoules are released when 55.3 g of C₂H₄reacts?

Correct Answer
verified

Consider the reaction: N₂(g) + O₂(g) 2 NO(g) . If [N₂] = 0.520 M, [O₂] = 0.0662 M, and [NO] = 0.00956 at equilibrium, what is the value of K?

Correct Answer
verified

Correct Answer
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Correct Answer
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Consider the reaction: PCl₃(g) + Cl₂(g) PCl₅(g) . If [PCl₃] = 0.78 M, [Cl₂] = 0.44 M, and [PCl₅] = 0.88 at equilibrium, what is the value of K?

Correct Answer
verified

An equilibrium constant with a value of 8.0 × 10⁶ indicates that at equilibrium

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A reversible reaction in which K = 9.65 × 10^-14 contains a negligible amount of reactants at equilibrium.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The $\Delta$ H for the reaction depicted by the energy diagram below is . $The \Delta H for the reaction depicted by the energy diagram below is .$

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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