Question 1

(p. Various sections)  Which of the following has an effect on the magnitude of the equilibrium constant?

Accepted Answer

A)   removing products as they are formed
B)   adding more of a reactant
C)   adding a catalyst
D)   increasing the pressure, in a gas-phase reaction
E)   change in temperature

Question 2

The equilibrium constant for the reaction of bromine with chlorine to form bromine monochloride is 4 B)  1.72 *10¯2 C)  3.45 * 10¯2 D)  1.31 *10¯1 E)  > 1.00" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   2.97 *10¯4
B)   1.72 *10¯2
C)   3.45 * 10¯2
D)   1.31 *10¯1
E)   > 1.00

Question 3

Nitric oxide is formed in automobile exhaust when nitrogen and oxygen in air react at high temperatures. p for the reaction is 0.0025 at 2127  \degree C. If a container is charged with 8.00 atm of nitrogen and 5.00 atm of oxygen and the mixture is allowed to reach equilibrium, what will be the equilibrium partial pressure of nitrogen? A)  0.16 atm B)  0.31 atm C)  3.1 atm D)  7.7 atm E)  7.8 atm " class="answers-bank-image d-inline" rel="preload" > The equilibrium constant Kp for the reaction is 0.0025 at 2127  °\degree° C. If a container is charged with 8.00 atm of nitrogen and 5.00 atm of oxygen and the mixture is allowed to reach equilibrium, what will be the equilibrium partial pressure of nitrogen?

Accepted Answer

A)   0.16 atm
B)   0.31 atm
C)   3.1 atm
D)   7.7 atm
E)   7.8 atm

Question 4

For some gas-phase reactions, Kp = Kc.

Accepted Answer

A) True 
 B)False

Question 5

The reaction system 3 and POCl will remain steady while the partial pressure of chlorine increases. D)  The partial pressure of chlorine remains steady while the partial pressures of POCl3 and POCl increase. E)  The partial pressure of chlorine will increase while the partial pressure of POCl decreases." class="answers-bank-image d-inline" rel="preload" > is at equilibrium. Which of the following statements describes the behavior of the system if POCl is added to the container?

Accepted Answer

A)   The forward reaction will proceed to establish equilibrium.
B)   The reverse reaction will proceed to establish equilibrium.
C)   The partial pressures of POCl3 and POCl will remain steady while the partial pressure of chlorine increases.
D)   The partial pressure of chlorine remains steady while the partial pressures of POCl3 and POCl increase.
E)   The partial pressure of chlorine will increase while the partial pressure of POCl decreases.

Question 6

What is the mass-action expression, Qc, for the following chemical reaction? c, for the following chemical reaction?   A)    B)    C)    D)    E)  None of these choices is correct." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   c, for the following chemical reaction?   
A)     
B)     
C)     
D)     
E)   None of these choices is correct." class="answers-bank-image d-inline" rel="preload" >
B)   c, for the following chemical reaction?   
A)     
B)     
C)     
D)     
E)   None of these choices is correct." class="answers-bank-image d-inline" rel="preload" >
C)   c, for the following chemical reaction?   
A)     
B)     
C)     
D)     
E)   None of these choices is correct." class="answers-bank-image d-inline" rel="preload" >
D)   c, for the following chemical reaction?   
A)     
B)     
C)     
D)     
E)   None of these choices is correct." class="answers-bank-image d-inline" rel="preload" >
E)   None of these choices is correct.

Question 7

When a chemical system is at equilibrium,

Accepted Answer

A)   the concentrations of the reactants are equal to the concentrations of the products.
B)   the concentrations of the reactants and products have reached constant values.
C)   the forward and reverse reactions have stopped.
D)   the reaction quotient, Q, has reached a maximum.
E)   the reaction quotient, Q, has reached a minimum.

Question 8

About half of the sodium carbonate produced is used in making glass products because it lowers the melting point of sand, the major component of glass. When sodium carbonate is added to water, it hydrolyses according to the following reactions. 3? A)  K1 *K2 B)  K1 ¸ K2 C)  K1 + K2 D)  K1 - K2 E)  (K1K2) 2" class="answers-bank-image d-inline" rel="preload" > What is the value of K3?

Accepted Answer

A)   K1 *K2
B)   K1 ¸ K2
C)   K1 + K2
D)   K1 - K2
E)   (K1K2) 2

Question 9

Hydrogen sulfide can be formed in the following reaction: p = 106 at 1023 K. Estimate the value of Kp at 1218 K. A)  5.05 B)  18.8 C)  34.7 D)  88.9 E)  598" class="answers-bank-image d-inline" rel="preload" > The equilibrium constant Kp = 106 at 1023 K. Estimate the value of Kp at 1218 K.

Accepted Answer

A)   5.05
B)   18.8
C)   34.7
D)   88.9
E)   598

Question 10

A container was charged with hydrogen, nitrogen, and ammonia gases at 120  °\degree° C and the system was allowed to reach equilibrium. What will happen if the volume of the container is increased at constant temperature?

Accepted Answer

A)   There will be no effect.
B)   More ammonia will be produced at the expense of hydrogen and nitrogen.
C)   Hydrogen and nitrogen will be produced at the expense of ammonia.
D)   The equilibrium constant will increase.
E)   The equilibrium constant will decrease.

Question 11

If all of the coefficients in the balanced equation for an equilibrium reaction are doubled, then the value of the equilibrium constant, Kc, will also be doubled.

Accepted Answer

A) True 
 B)False

Question 12

SO2 reacts with O2 to produce SO3. If 86.0 g of SO2 is placed in a reaction vessel along with excess oxygen gas, how many moles of SO2 remain when 50.0 g of SO3 have been formed?

Accepted Answer

A)   0.56 mol
B)   0.62 mol
C)   0.72 mol
D)   0.78 mol
E)   1.34 mol

Question 13

Write the mass-action expression, Qc, for the following chemical reaction. c, for the following chemical reaction.   A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   c, for the following chemical reaction.   
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   c, for the following chemical reaction.   
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   c, for the following chemical reaction.   
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   c, for the following chemical reaction.   
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   c, for the following chemical reaction.   
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >

Question 14

Hydrogen sulfide will react with water as shown in the following reactions. 2? A)  1.3 * 10¯27 B)  2.3 *10¯7 C)  1.3 * 10¯13 D)  7.7 *1012 E)  7.7 * 1026" class="answers-bank-image d-inline" rel="preload" > What is the value of K2?

Accepted Answer

A)   1.3 * 10¯27
B)   2.3 *10¯7
C)   1.3 * 10¯13
D)   7.7 *1012
E)   7.7 * 1026

Question 15

The equilibrium constant for reaction (1)  below is 276. Under the same conditions, what is the equilibrium constant of reaction (2) ?2 B)  7.25 * 10¯3 C)  3.62 *10¯3 D)  1.31 * 10¯5 E)  None of these choices is correct." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   6.02 * 10¯2
B)   7.25 * 10¯3
C)   3.62 *10¯3
D)   1.31 * 10¯5
E)   None of these choices is correct.

Question 16

Given this equilibrium constant data at 25  °\degree° C, 8 B)  1.3 * 10¯11 C)  7.8 *1010 D)  1.5 * 107 E)  None of these choices is correct. " class="answers-bank-image d-inline" rel="preload" > what is the value of Kc at this temperature for the reaction 8 B)  1.3 * 10¯11 C)  7.8 *1010 D)  1.5 * 107 E)  None of these choices is correct. " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   6.5 * 10¯8
B)   1.3 * 10¯11
C)   7.8 *1010
D)   1.5 * 107
E)   None of these choices is correct.

Question 17

The equilibrium constant, Kp, has a value of 6.5 *10¯4 at 308 K for the reaction of nitrogen monoxide with chlorine. p, has a value of 6.5 *10¯4 at 308 K for the reaction of nitrogen monoxide with chlorine.   What is the value of Kc? A)  2.5 * 10¯7 B)  6.5 * 10¯4 C)  1.6 * 10¯2 D)  1.7 E)  None of these choices is correct." class="answers-bank-image d-inline" rel="preload" > What is the value of Kc?

Accepted Answer

A)   2.5 * 10¯7
B)   6.5 * 10¯4
C)   1.6 * 10¯2
D)   1.7
E)   None of these choices is correct.

Question 18

Unless $\Delta$H$\degree$rxn = 0, a change in temperature will affect the value of the equilibrium constant Kc.

Accepted Answer

A) True 
 B)False

Question 19

Consider the equilibrium reaction shown below. B2(g)  2(g)    2B(g)  If the rate constants are: kfwd = 7.00 * 10¯5 s¯1 and krev = 2.00 * 10¯5 L mol¯1 s¯1, what is the value of Kc under these conditions? A)  1.75 * 105 B)  3.50 C)  0.286 D)  5.71 *10¯6 E)  1.40 * 10¯10" class="answers-bank-image d-inline" rel="preload" > 2B(g) 
If the rate constants are: kfwd = 7.00 * 10¯5 s¯1 and krev = 2.00 * 10¯5 L mol¯1 s¯1, what is the value of Kc under these conditions?

Accepted Answer

A)   1.75 * 105
B)   3.50
C)   0.286
D)   5.71 *10¯6
E)   1.40 * 10¯10

Question 20

At 500  °\degree° C, the equilibrium constant, Kp, is 4.00 *10¯4 for the equilibrium: p, is 4.00 *10¯4 for the equilibrium:   A)  2.00* 10¯4 B)  -4.00*10¯4 C)  1.25 *103 D)  2.50 * 103 E)  4.00 * 104 " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   2.00* 10¯4
B)   -4.00*10¯4
C)   1.25 *103
D)   2.50 * 103
E)   4.00 * 104

Exam 17: Equilibrium: the Extent of Chemical Reactions

Consider the equilibrium reaction shown below. B₂(g) 2B(g) If the rate constants are: k_fwd = 7.00 * 10¯⁵ s¯¹ and k_rev = 2.00 * 10¯⁵ L mol¯¹ s¯¹, what is the value of K_c under these conditions?

Correct Answer
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Write the mass-action expression, Q_c, for the following chemical reaction.

Correct Answer
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SO₂ reacts with O₂ to produce SO₃. If 86.0 g of SO₂ is placed in a reaction vessel along with excess oxygen gas, how many moles of SO₂ remain when 50.0 g of SO₃ have been formed?

Correct Answer
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Hydrogen sulfide can be formed in the following reaction: The equilibrium constant K_p = 106 at 1023 K. Estimate the value of K_p at 1218 K.

Correct Answer
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The equilibrium constant for reaction (1) below is 276. Under the same conditions, what is the equilibrium constant of reaction (2) ?

Correct Answer
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The reaction system is at equilibrium. Which of the following statements describes the behavior of the system if POCl is added to the container?

Correct Answer
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(p. Various sections) Which of the following has an effect on the magnitude of the equilibrium constant?

Correct Answer
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Correct Answer
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Correct Answer
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The equilibrium constant for the reaction of bromine with chlorine to form bromine monochloride is

Correct Answer
verified

What is the mass-action expression, Q_c, for the following chemical reaction?

Correct Answer
verified

If all of the coefficients in the balanced equation for an equilibrium reaction are doubled, then the value of the equilibrium constant, K_c, will also be doubled.

Correct Answer
verified

Correct Answer
verified

For some gas-phase reactions, K_p = K_c.

Correct Answer
verified

When a chemical system is at equilibrium,

Correct Answer
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Hydrogen sulfide will react with water as shown in the following reactions. What is the value of K₂?

Correct Answer
verified

About half of the sodium carbonate produced is used in making glass products because it lowers the melting point of sand, the major component of glass. When sodium carbonate is added to water, it hydrolyses according to the following reactions. What is the value of K₃?

Correct Answer
verified

The equilibrium constant, K_p, has a value of 6.5 *10¯⁴ at 308 K for the reaction of nitrogen monoxide with chlorine. What is the value of K_c?

Correct Answer
verified

Correct Answer
verified

Unless $\Delta$ H $\degree$ _rxn = 0, a change in temperature will affect the value of the equilibrium constant K_c.

Correct Answer
verified

Exam 17: Equilibrium: the Extent of Chemical Reactions

Consider the equilibrium reaction shown below. B2(g) 2B(g) If the rate constants are: kfwd = 7.00 * 10¯5 s¯1 and krev = 2.00 * 10¯5 L mol¯1 s¯1, what is the value of Kc under these conditions?

Correct AnswerverifiedShow Answer

Write the mass-action expression, Qc, for the following chemical reaction.

Correct AnswerverifiedShow Answer

SO2 reacts with O2 to produce SO3. If 86.0 g of SO2 is placed in a reaction vessel along with excess oxygen gas, how many moles of SO2 remain when 50.0 g of SO3 have been formed?

Correct AnswerverifiedShow Answer

Hydrogen sulfide can be formed in the following reaction: The equilibrium constant Kp = 106 at 1023 K. Estimate the value of Kp at 1218 K.

Correct AnswerverifiedShow Answer

The equilibrium constant for reaction (1) below is 276. Under the same conditions, what is the equilibrium constant of reaction (2) ?

Correct AnswerverifiedShow Answer

The reaction system is at equilibrium. Which of the following statements describes the behavior of the system if POCl is added to the container?

Correct AnswerverifiedShow Answer

(p. Various sections) Which of the following has an effect on the magnitude of the equilibrium constant?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Given this equilibrium constant data at 25 °\degree° C, what is the value of Kc at this temperature for the reaction

Correct AnswerverifiedShow Answer

The equilibrium constant for the reaction of bromine with chlorine to form bromine monochloride is

Correct AnswerverifiedShow Answer

What is the mass-action expression, Qc, for the following chemical reaction?

Correct AnswerverifiedShow Answer

If all of the coefficients in the balanced equation for an equilibrium reaction are doubled, then the value of the equilibrium constant, Kc, will also be doubled.

Correct AnswerverifiedShow Answer

At 500 °\degree° C, the equilibrium constant, Kp, is 4.00 *10¯4 for the equilibrium:

Correct AnswerverifiedShow Answer

For some gas-phase reactions, Kp = Kc.

Correct AnswerverifiedShow Answer

When a chemical system is at equilibrium,

Correct AnswerverifiedShow Answer

Hydrogen sulfide will react with water as shown in the following reactions. What is the value of K2?

Correct AnswerverifiedShow Answer

About half of the sodium carbonate produced is used in making glass products because it lowers the melting point of sand, the major component of glass. When sodium carbonate is added to water, it hydrolyses according to the following reactions. What is the value of K3?

Correct AnswerverifiedShow Answer

The equilibrium constant, Kp, has a value of 6.5 *10¯4 at 308 K for the reaction of nitrogen monoxide with chlorine. What is the value of Kc?

Correct AnswerverifiedShow Answer

A container was charged with hydrogen, nitrogen, and ammonia gases at 120 °\degree° C and the system was allowed to reach equilibrium. What will happen if the volume of the container is increased at constant temperature?

Correct AnswerverifiedShow Answer

Unless Δ\DeltaΔ H °\degree° rxn = 0, a change in temperature will affect the value of the equilibrium constant Kc.

Correct AnswerverifiedShow Answer

Consider the equilibrium reaction shown below. B₂(g) 2B(g) If the rate constants are: k_fwd = 7.00 * 10¯⁵ s¯¹ and k_rev = 2.00 * 10¯⁵ L mol¯¹ s¯¹, what is the value of K_c under these conditions?

Correct Answer
verified

Write the mass-action expression, Q_c, for the following chemical reaction.

Correct Answer
verified

SO₂ reacts with O₂ to produce SO₃. If 86.0 g of SO₂ is placed in a reaction vessel along with excess oxygen gas, how many moles of SO₂ remain when 50.0 g of SO₃ have been formed?

Correct Answer
verified

Hydrogen sulfide can be formed in the following reaction: The equilibrium constant K_p = 106 at 1023 K. Estimate the value of K_p at 1218 K.

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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What is the mass-action expression, Q_c, for the following chemical reaction?

Correct Answer
verified

If all of the coefficients in the balanced equation for an equilibrium reaction are doubled, then the value of the equilibrium constant, K_c, will also be doubled.

Correct Answer
verified

Correct Answer
verified

For some gas-phase reactions, K_p = K_c.

Correct Answer
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Correct Answer
verified

Hydrogen sulfide will react with water as shown in the following reactions. What is the value of K₂?

Correct Answer
verified

About half of the sodium carbonate produced is used in making glass products because it lowers the melting point of sand, the major component of glass. When sodium carbonate is added to water, it hydrolyses according to the following reactions. What is the value of K₃?

Correct Answer
verified

The equilibrium constant, K_p, has a value of 6.5 *10¯⁴ at 308 K for the reaction of nitrogen monoxide with chlorine. What is the value of K_c?

Correct Answer
verified

Correct Answer
verified

Unless $\Delta$ H $\degree$ _rxn = 0, a change in temperature will affect the value of the equilibrium constant K_c.

Correct Answer
verified