Question 1

Ethane can be formed by reacting acetylene with hydrogen. C2H2(g)  + 2H2(g)  2H2(g)  + 2H2(g)    C2H6(g)  ΔH°rxn = -311 kJ Under which reaction conditions would you expect to have the greatest equilibrium yield of ethane? A)  high temperature, high pressure B)  low temperature, high pressure C)  high temperature, low pressure D)  low temperature, low pressure E)  None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > C2H6(g)  ΔH°rxn = -311 kJ
Under which reaction conditions would you expect to have the greatest equilibrium yield of ethane?

Accepted Answer

A)   high temperature, high pressure
B)   low temperature, high pressure
C)   high temperature, low pressure
D)   low temperature, low pressure
E)   None of these choices are correct.F) A) and E)
G) B) and E)

Question 2

The reaction of nitric oxide to form dinitrogen oxide and nitrogen dioxide is exothermic. 3NO(g)  2O(g)  + NO2(g)  + heat What effect will be seen if the temperature of the system at equilibrium is raised by 25°C? A)  The partial pressure of NO will increase. B)  The partial pressure of NO will decrease. C)  The partial pressure of NO2 will increase. D)  The partial pressures of NO and N2O will increase. E)  All three partial pressures will increase." class="answers-bank-image d-inline" rel="preload" > N2O(g)  + NO2(g)  + heat
What effect will be seen if the temperature of the system at equilibrium is raised by 25°C?

Accepted Answer

A)   The partial pressure of NO will increase.
B)   The partial pressure of NO will decrease.
C)   The partial pressure of NO2 will increase.
D)   The partial pressures of NO and N2O will increase.
E)   All three partial pressures will increase.F) A) and B)
G) None of the above

Question 3

A good catalyst for a reaction will speed up the forward reaction and slow down the reverse reaction.

Accepted Answer

A) True 
 B)False

Question 4

If all the reactants and products in an equilibrium reaction are in the gas phase, then Kp = Kc.

Accepted Answer

A) True 
 B)False

Question 5

The reaction system CS2(g)  + 4H2(g)  2(g)  + 4H2(g)    CH4(g)  + 2H2S(g)  Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of hydrogen is doubled? A)  As equilibrium is reestablished, the partial pressure of carbon disulfide increases. B)  As equilibrium is reestablished, the partial pressure of methane, CH4, decreases. C)  As equilibrium is reestablished, the partial pressure of hydrogen decreases. D)  As equilibrium is reestablished, the partial pressure of hydrogen sulfide decreases. E)  As equilibrium is reestablished, all the partial pressures will decrease." class="answers-bank-image d-inline" rel="preload" > CH4(g)  + 2H2S(g) 
Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of hydrogen is doubled?

Accepted Answer

A)   As equilibrium is reestablished, the partial pressure of carbon disulfide increases.
B)   As equilibrium is reestablished, the partial pressure of methane, CH4, decreases.
C)   As equilibrium is reestablished, the partial pressure of hydrogen decreases.
D)   As equilibrium is reestablished, the partial pressure of hydrogen sulfide decreases.
E)   As equilibrium is reestablished, all the partial pressures will decrease.F) A) and D)
G) A) and C)

Question 6

The equilibrium constant Kc for the reaction A(g)  + B(g)   C(g) 
Is 0.76 at 150°C. If 0.800 mol of A is added to 0.600 mol of B in a 1.00-L container at 150°C, what will be the equilibrium concentration of C?

Accepted Answer

A)   0.19 M
B)   0.29 M
C)   0.36 M
D)   0.41 M
E)   0.51 MF) None of the above
G) B) and C)

Question 7

Write the mass-action expression, c, for the following chemical reaction. 3ClO2-(aq)  2ClO3-(aq)  + Cl-(aq)

Accepted Answer

A)   2-(aq)  2ClO3-(aq)  + Cl-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   2-(aq)  2ClO3-(aq)  + Cl-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   2-(aq)  2ClO3-(aq)  + Cl-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   2-(aq)  2ClO3-(aq)  + Cl-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   2-(aq)  2ClO3-(aq)  + Cl-(aq)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) A) and D)
G) D) and E) A

Question 8

Consider the equilibrium reaction: H2(g)  + Br2(g)  2(g)  + Br2(g)    2HBr(g)  Which of the following correctly describes the relationship between Kc and Kp for the reaction? A)  Kp = Kc B)  Kp = (RT) Kc C)  Kp = (RT) 2Kc D)  Kp = Kc / RT E)  Kp = Kc / (RT) 2" class="answers-bank-image d-inline" rel="preload" > 2HBr(g)  Which of the following correctly describes the relationship between Kc and Kp for the reaction?

Accepted Answer

A)   Kp = Kc
B)   Kp = (RT) Kc
C)   Kp = (RT) 2Kc
D)   Kp = Kc / RT
E)   Kp = Kc / (RT) 2F) All of the above
G) A) and D)

Question 9

Consider the equilibrium reaction shown below. B2(g)  fwd = 7.00 × 10-5s-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 × 10-5s-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 × 10-10F) B) and C)
G) A) and B)

Question 10

Once a reaction system reaches equilibrium, the concentrations of reactions and products no longer change.

Accepted Answer

A) True 
 B)False

Question 11

N2(g)  + O2(g)  2(g)  + O2(g)    2NO(g)  Kc = 4.8 × 10-31 2NOBr(g)    2NO(g)  + Br2(g)  Kc = 0.50 Given the above equilibrium constant data at 25°C, what is the value of Kc at this temperature for the reaction 2NOBr(g)    N2(g)  + O2(g)  + Br2(g) ? A)  2.4 × 10-31 B)  9.6 × 10-31 C)  1.0 × 1030 D)  4.2 × 1030 E)  None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > 2NO(g)  Kc = 4.8 × 10-31 2NOBr(g)  2(g)  + O2(g)    2NO(g)  Kc = 4.8 × 10-31 2NOBr(g)    2NO(g)  + Br2(g)  Kc = 0.50 Given the above equilibrium constant data at 25°C, what is the value of Kc at this temperature for the reaction 2NOBr(g)    N2(g)  + O2(g)  + Br2(g) ? A)  2.4 × 10-31 B)  9.6 × 10-31 C)  1.0 × 1030 D)  4.2 × 1030 E)  None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > 2NO(g)  + Br2(g)  Kc = 0.50
Given the above equilibrium constant data at 25°C, what is the value of Kc at this temperature for the reaction
2NOBr(g)  2(g)  + O2(g)    2NO(g)  Kc = 4.8 × 10-31 2NOBr(g)    2NO(g)  + Br2(g)  Kc = 0.50 Given the above equilibrium constant data at 25°C, what is the value of Kc at this temperature for the reaction 2NOBr(g)    N2(g)  + O2(g)  + Br2(g) ? A)  2.4 × 10-31 B)  9.6 × 10-31 C)  1.0 × 1030 D)  4.2 × 1030 E)  None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > N2(g)  + O2(g)  + Br2(g) ?

Accepted Answer

A)   2.4 × 10-31
B)   9.6 × 10-31
C)   1.0 × 1030
D)   4.2 × 1030
E)   None of these choices are correct.F) C) and D)
G) D) and E)

Question 12

Changing the amount of a solid reactant or product in an equilibrium reaction will not affect the amounts of the other reactants and products present at equilibrium.

Accepted Answer

A) True 
 B)False

Question 13

Write the mass-action expression, 3+(aq)  + 3OH-(aq)    Fe(OH) 3(s)  A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > c, for the following chemical reaction. Fe3+(aq)  + 3OH-(aq)  3+(aq)  + 3OH-(aq)    Fe(OH) 3(s)  A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > Fe(OH) 3(s)

Accepted Answer

A)   3+(aq)  + 3OH-(aq)    Fe(OH) 3(s)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   3+(aq)  + 3OH-(aq)    Fe(OH) 3(s)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   3+(aq)  + 3OH-(aq)    Fe(OH) 3(s)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   3+(aq)  + 3OH-(aq)    Fe(OH) 3(s)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   3+(aq)  + 3OH-(aq)    Fe(OH) 3(s)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) B) and D)
G) A) and E)

Question 14

Hydrogen sulfide can be formed in the following reaction: H2(g)  + ½S2(g)  2(g)  + ½S2(g)    H2S(g)  ΔH°rxn = -92 kJ The equilibrium constant Kp = 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" > H2S(g)  ΔH°rxn = -92 kJ
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)   598F) A) and D)
G) A) and B)

Question 15

Carbon monoxide and chlorine combine in an equilibrium reaction to produce the highly toxic product, phosgene (COCl2)  CO(g)  + Cl2(g)  2)  CO(g)  + Cl2(g)    COCl2(g)  If the equilibrium constant for this reaction is Kc = 248, predict, if possible, what will happen when the reactants and product are combined with the concentrations shown. [CO] = [Cl2] = 0.010 M; [COCl2] = 0.070 M A)  The reaction will proceed to the right. B)  The reaction will proceed to the left. C)  The reaction is at equilibrium, and no change in concentrations will occur. D)  The container volume needs to be specified before a prediction can be made. E)  The temperature needs to be specified before a prediction can be made." class="answers-bank-image d-inline" rel="preload" > COCl2(g) 
If the equilibrium constant for this reaction is Kc = 248, predict, if possible, what will happen when the reactants and product are combined with the concentrations shown.
[CO] = [Cl2] = 0.010 M; [COCl2] = 0.070 M

Accepted Answer

A)   The reaction will proceed to the right.
B)   The reaction will proceed to the left.
C)   The reaction is at equilibrium, and no change in concentrations will occur.
D)   The container volume needs to be specified before a prediction can be made.
E)   The temperature needs to be specified before a prediction can be made.F) C) and E)
G) A) and E)

Question 16

Hydrogen bromide will dissociate into hydrogen and bromine gases. 2HBr(g)  2(g)  + Br2(g)  ΔH°rxn = 68 kJ What effect will a temperature increase of 50°C have on this system at equilibrium? A)  The partial pressure of hydrogen bromide will increase. B)  The partial pressure of hydrogen will increase. C)  The partial pressure of hydrogen bromide and bromine will increase. D)  There will be no effect on the partial pressure of any of the gases. E)  Need to know the initial pressure, volume, and temperature before any of the above predictions can be made." class="answers-bank-image d-inline" rel="preload" > H2(g)  + Br2(g)  ΔH°rxn = 68 kJ
What effect will a temperature increase of 50°C have on this system at equilibrium?

Accepted Answer

A)   The partial pressure of hydrogen bromide will increase.
B)   The partial pressure of hydrogen will increase.
C)   The partial pressure of hydrogen bromide and bromine will increase.
D)   There will be no effect on the partial pressure of any of the gases.
E)   Need to know the initial pressure, volume, and temperature before any of the above predictions can be made.F) C) and E)
G) C) and D)

Question 17

When a reaction system reaches equilibrium, the forward and reverse reactions stop.

Accepted Answer

A) True 
 B)False

Question 18

For a gas-phase equilibrium, a change in the pressure of any single reactant or product will change Kp.

Accepted Answer

A) True 
 B)False  False

Question 19

What is the mass-action expression, 2(g)  A)    B)    C)    D)    E)  None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > c, for the following chemical reaction? PbO(s)  + CO(g)  2(g)  A)    B)    C)    D)    E)  None of these choices are correct." class="answers-bank-image d-inline" rel="preload" > Pb(l)  + CO2(g)

Accepted Answer

A)   2(g)  
A)     
B)     
C)     
D)     
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" >
B)   2(g)  
A)     
B)     
C)     
D)     
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" >
C)   2(g)  
A)     
B)     
C)     
D)     
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" >
D)   2(g)  
A)     
B)     
C)     
D)     
E)   None of these choices are correct." class="answers-bank-image d-inline" rel="preload" >
E)   None of these choices are correct.F) D) and E)
G) C) and D) A

Question 20

The equilibrium constant, Kp, for the reaction CO(g)  + H2O(g)  2O(g)    CO2(g)  + H2(g)  At 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equilibrium? A)  Yes. B)  No, the forward reaction must proceed to establish equilibrium. C)  No, the reverse reaction must proceed to establish equilibrium. D)  Need to know the volume of the container before deciding. E)  Need to know the starting concentrations of all substances before deciding." class="answers-bank-image d-inline" rel="preload" > CO2(g)  + H2(g) 
At 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equilibrium?

Accepted Answer

A)   Yes.
B)   No, the forward reaction must proceed to establish equilibrium.
C)   No, the reverse reaction must proceed to establish equilibrium.
D)   Need to know the volume of the container before deciding.
E)   Need to know the starting concentrations of all substances before deciding.F) B) and C)
G) B) and E)

Exam 17: Equilibrium the Extent of Chemical Reactions

Ethane can be formed by reacting acetylene with hydrogen. C₂H₂(g) + 2H₂(g) C₂H₆(g) ΔH°_rxn = -311 kJ Under which reaction conditions would you expect to have the greatest equilibrium yield of ethane?

Correct Answer
verified

The reaction of nitric oxide to form dinitrogen oxide and nitrogen dioxide is exothermic. 3NO(g) N₂O(g) + NO₂(g) + heat What effect will be seen if the temperature of the system at equilibrium is raised by 25°C?

Correct Answer
verified

A good catalyst for a reaction will speed up the forward reaction and slow down the reverse reaction.

Correct Answer
verified

If all the reactants and products in an equilibrium reaction are in the gas phase, then K_p = K_c.

Correct Answer
verified

The reaction system CS₂(g) + 4H₂(g) CH₄(g) + 2H₂S(g) Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of hydrogen is doubled?

Correct Answer
verified

The equilibrium constant Kc for the reaction A(g) + B(g) C(g) Is 0.76 at 150°C. If 0.800 mol of A is added to 0.600 mol of B in a 1.00-L container at 150°C, what will be the equilibrium concentration of C?

Correct Answer
verified

Write the mass-action expression, c, for the following chemical reaction. 3ClO₂^-(aq) 2ClO₃^-(aq) + Cl^-(aq)

Correct Answer
verified
A

Consider the equilibrium reaction: H₂(g) + Br₂(g) 2HBr(g) Which of the following correctly describes the relationship between K_c and K_p for the reaction?

Correct Answer
verified

Consider the equilibrium reaction shown below. B2(g) 2B(g) If the rate constants are: k_fwd = 7.00 × 10^-5s^-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

Once a reaction system reaches equilibrium, the concentrations of reactions and products no longer change.

Correct Answer
verified

N₂(g) + O₂(g) 2NO(g) K_c = 4.8 × 10^-31 2NOBr(g) 2NO(g) + Br₂(g) K_c = 0.50 Given the above equilibrium constant data at 25°C, what is the value of K_c at this temperature for the reaction 2NOBr(g) N₂(g) + O₂(g) + Br₂(g) ?

Correct Answer
verified

Changing the amount of a solid reactant or product in an equilibrium reaction will not affect the amounts of the other reactants and products present at equilibrium.

Correct Answer
verified

Write the mass-action expression, c, for the following chemical reaction. Fe³⁺(aq) + 3OH^-(aq) Fe(OH) ₃(s)

Correct Answer
verified

Hydrogen sulfide can be formed in the following reaction: H₂(g) + ½S₂(g) H₂S(g) ΔH°rxn = -92 kJ The equilibrium constant K_p = 106 at 1023 K. Estimate the value of K_p at 1218 K.

Correct Answer
verified

Correct Answer
verified

Hydrogen bromide will dissociate into hydrogen and bromine gases. 2HBr(g) H₂(g) + Br₂(g) ΔH°_rxn = 68 kJ What effect will a temperature increase of 50°C have on this system at equilibrium?

Correct Answer
verified

When a reaction system reaches equilibrium, the forward and reverse reactions stop.

Correct Answer
verified

For a gas-phase equilibrium, a change in the pressure of any single reactant or product will change K_p.

Correct Answer
verified
False

What is the mass-action expression, c, for the following chemical reaction? PbO(s) + CO(g) Pb(l) + CO₂(g)

Correct Answer
verified
A

The equilibrium constant, Kp, for the reaction CO(g) + H₂O(g) CO₂(g) + H₂(g) At 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equilibrium?

Correct Answer
verified

Exam 17: Equilibrium the Extent of Chemical Reactions

Ethane can be formed by reacting acetylene with hydrogen. C2H2(g) + 2H2(g) C2H6(g) ΔH°rxn = -311 kJ Under which reaction conditions would you expect to have the greatest equilibrium yield of ethane?

Correct AnswerverifiedShow Answer

The reaction of nitric oxide to form dinitrogen oxide and nitrogen dioxide is exothermic. 3NO(g) N2O(g) + NO2(g) + heat What effect will be seen if the temperature of the system at equilibrium is raised by 25°C?

Correct AnswerverifiedShow Answer

A good catalyst for a reaction will speed up the forward reaction and slow down the reverse reaction.

Correct AnswerverifiedShow Answer

If all the reactants and products in an equilibrium reaction are in the gas phase, then Kp = Kc.

Correct AnswerverifiedShow Answer

The reaction system CS2(g) + 4H2(g) CH4(g) + 2H2S(g) Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of hydrogen is doubled?

Correct AnswerverifiedShow Answer

The equilibrium constant Kc for the reaction A(g) + B(g) C(g) Is 0.76 at 150°C. If 0.800 mol of A is added to 0.600 mol of B in a 1.00-L container at 150°C, what will be the equilibrium concentration of C?

Correct AnswerverifiedShow Answer

Write the mass-action expression, c, for the following chemical reaction. 3ClO2-(aq) 2ClO3-(aq) + Cl-(aq)

Correct AnswerverifiedA

Consider the equilibrium reaction: H2(g) + Br2(g) 2HBr(g) Which of the following correctly describes the relationship between Kc and Kp for the reaction?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Once a reaction system reaches equilibrium, the concentrations of reactions and products no longer change.

Correct AnswerverifiedShow Answer

N2(g) + O2(g) 2NO(g) Kc = 4.8 × 10-31 2NOBr(g) 2NO(g) + Br2(g) Kc = 0.50 Given the above equilibrium constant data at 25°C, what is the value of Kc at this temperature for the reaction 2NOBr(g) N2(g) + O2(g) + Br2(g) ?

Correct AnswerverifiedShow Answer

Changing the amount of a solid reactant or product in an equilibrium reaction will not affect the amounts of the other reactants and products present at equilibrium.

Correct AnswerverifiedShow Answer

Write the mass-action expression, c, for the following chemical reaction. Fe3+(aq) + 3OH-(aq) Fe(OH) 3(s)

Correct AnswerverifiedShow Answer

Hydrogen sulfide can be formed in the following reaction: H2(g) + ½S2(g) H2S(g) ΔH°rxn = -92 kJ The equilibrium constant Kp = 106 at 1023 K. Estimate the value of Kp at 1218 K.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Hydrogen bromide will dissociate into hydrogen and bromine gases. 2HBr(g) H2(g) + Br2(g) ΔH°rxn = 68 kJ What effect will a temperature increase of 50°C have on this system at equilibrium?

Correct AnswerverifiedShow Answer

When a reaction system reaches equilibrium, the forward and reverse reactions stop.

Correct AnswerverifiedShow Answer

For a gas-phase equilibrium, a change in the pressure of any single reactant or product will change Kp.

Correct AnswerverifiedFalse

What is the mass-action expression, c, for the following chemical reaction? PbO(s) + CO(g) Pb(l) + CO2(g)

Correct AnswerverifiedA

The equilibrium constant, Kp, for the reaction CO(g) + H2O(g) CO2(g) + H2(g) At 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equilibrium?

Correct AnswerverifiedShow Answer

Ethane can be formed by reacting acetylene with hydrogen. C₂H₂(g) + 2H₂(g) C₂H₆(g) ΔH°_rxn = -311 kJ Under which reaction conditions would you expect to have the greatest equilibrium yield of ethane?

Correct Answer
verified

The reaction of nitric oxide to form dinitrogen oxide and nitrogen dioxide is exothermic. 3NO(g) N₂O(g) + NO₂(g) + heat What effect will be seen if the temperature of the system at equilibrium is raised by 25°C?

Correct Answer
verified

Correct Answer
verified

If all the reactants and products in an equilibrium reaction are in the gas phase, then K_p = K_c.

Correct Answer
verified

The reaction system CS₂(g) + 4H₂(g) CH₄(g) + 2H₂S(g) Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of hydrogen is doubled?

Correct Answer
verified

Correct Answer
verified

Write the mass-action expression, c, for the following chemical reaction. 3ClO₂^-(aq) 2ClO₃^-(aq) + Cl^-(aq)

Correct Answer
verified
A

Consider the equilibrium reaction: H₂(g) + Br₂(g) 2HBr(g) Which of the following correctly describes the relationship between K_c and K_p for the reaction?

Correct Answer
verified

Consider the equilibrium reaction shown below. B2(g) 2B(g) If the rate constants are: k_fwd = 7.00 × 10^-5s^-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

Correct Answer
verified

N₂(g) + O₂(g) 2NO(g) K_c = 4.8 × 10^-31 2NOBr(g) 2NO(g) + Br₂(g) K_c = 0.50 Given the above equilibrium constant data at 25°C, what is the value of K_c at this temperature for the reaction 2NOBr(g) N₂(g) + O₂(g) + Br₂(g) ?

Correct Answer
verified

Correct Answer
verified

Write the mass-action expression, c, for the following chemical reaction. Fe³⁺(aq) + 3OH^-(aq) Fe(OH) ₃(s)

Correct Answer
verified

Hydrogen sulfide can be formed in the following reaction: H₂(g) + ½S₂(g) H₂S(g) ΔH°rxn = -92 kJ The equilibrium constant K_p = 106 at 1023 K. Estimate the value of K_p at 1218 K.

Correct Answer
verified

Correct Answer
verified

Hydrogen bromide will dissociate into hydrogen and bromine gases. 2HBr(g) H₂(g) + Br₂(g) ΔH°_rxn = 68 kJ What effect will a temperature increase of 50°C have on this system at equilibrium?

Correct Answer
verified

Correct Answer
verified

For a gas-phase equilibrium, a change in the pressure of any single reactant or product will change K_p.

Correct Answer
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False

What is the mass-action expression, c, for the following chemical reaction? PbO(s) + CO(g) Pb(l) + CO₂(g)

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A

The equilibrium constant, Kp, for the reaction CO(g) + H₂O(g) CO₂(g) + H₂(g) At 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equilibrium?

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