Question 1

An equilibrium mixture of CO,O2 and CO2 at a certain temperature contains 0.0010 M CO2 and 0.0015 M O2.At this temperature,Kc equals 1.4 × 102 for the reaction:
2 CO(g) + O2(g) ⇌ 2 CO2(g) .
What is the equilibrium concentration of CO?

Accepted Answer

A)   4.8 × 10-6 M
B)   2.2 × 10-3 M
C)   9.3 × 10-2 M
D)   3.1 × 10-1 ME) C) and D)
F) A) and C)

Question 2

The reaction below has a Kp value of 41.What is the value of Kc for this reaction at 400 K?
N2(g) + 3 H2(g) ⇌ 2 NH3(g)

Accepted Answer

A)   3.8 × 10-2
B)   4.4 × 104
C)   26
D)   2.3 × 10-5
E)   41F) A) and B)
G) B) and D)

Question 3

Give the direction of the reaction,if K >> 1.

Accepted Answer

A)   The forward reaction is favored.
B)   The reverse reaction is favored.
C)   Neither direction is favored.
D)   If the temperature is raised, then the forward reaction is favored.
E)   If the temperature is raised, then the reverse reaction is favored.F) A) and B)
G) C) and E)

Question 4

Consider the following reaction: CO2(g) + C(graphite) ⇌ 2 CO(g) 
A reaction mixture initially contains 0.56 atm CO2 and 0.32 atm CO.Determine the equilibrium pressure of CO if Kp for the reaction at this temperature is 2.25.

Accepted Answer

A)   0.83 atm
B)   0.31 atm
C)   0.26 atm
D)   0.58 atm
E)   0.42 atmF) A) and C)
G) B) and D)

Question 5

In a reaction mixture containing reactants and products,each at a concentration of 1M,what is the value of Q?

Accepted Answer

A)   -1
B)   1
C)   ∞
D)   0
E)   It cannot be determined without concentrations.F) B) and D)
G) B) and E)

Question 6

At a certain temperature,nitrogen and hydrogen react to form ammonia: N2(g) + 3 H2(g) ⇌ 2 NH3(g) .
When initial amounts of N2,H2,and NH3 are mixed,the concentration of NH3 increases.Which statement below is TRUE?

Accepted Answer

A)   Kc 
B)   Kc > Q
C)   Kc = Q
D)   More information is needed to make a statement about Kc.E) B) and C)
F) A) and B)

Question 7

The equilibrium constant is given for two of the reactions below.Determine the value of the missing equilibrium constant. A(g) + 2B(g) ⇌ AB2(g) Kc = 59
AB2(g) + B(g) ⇌ AB3(g) Kc = ?
A(g) + 3B(g) ⇌ AB3(g) Kc = 478

Accepted Answer

A)   3.5 × 10-5
B)   2.8 × 104
C)   8.1
D)   0.12
E)   89F) A) and C)
G) A) and B)

Question 8

Express the equilibrium constant for the following reaction. 2 N2(g) + 6 H2(g) ⇔ 4 NH3(g)

Accepted Answer

A)   K = 2(g) + 6 H2(g) ⇔ 4 NH3(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
B)   K = 2(g) + 6 H2(g) ⇔ 4 NH3(g)  
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B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
C)   K = 2(g) + 6 H2(g) ⇔ 4 NH3(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
D)   K = 2(g) + 6 H2(g) ⇔ 4 NH3(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
E)   K = 2(g) + 6 H2(g) ⇔ 4 NH3(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >F) C) and D)
G) A) and D)

Question 9

The Kp for the reaction below is 1.49 × 108 at 100.0°C: CO(g) + Cl2(g) → COCl2(g) 
In an equilibrium mixture of the three gases,PCO = p for the reaction below is 1.49 × 108 at 100.0°C: CO(g) + Cl2(g) → COCl2(g)  In an equilibrium mixture of the three gases,PCO =   = 4.44 × 10-4 atm.The partial pressure of the product,phosgene (COCl2) ,is ________ atm. A)  2.94 × 101 B)  7.56 × 1014 C)  1.32 × 10-15 D)  6.62 × 104 E)  3.33 × 1011" class="answers-bank-image d-inline" rel="preload" > = 4.44 × 10-4 atm.The partial pressure of the product,phosgene (COCl2) ,is ________ atm.

Accepted Answer

A)   2.94 × 101
B)   7.56 × 1014
C)   1.32 × 10-15
D)   6.62 × 104
E)   3.33 × 1011F) B) and E)
G) C) and D) A

Question 10

The following reaction is exothermic.Which change will shift the equilibrium to the left?
2 SO2(g) + O2(g) ⇌ 2 SO3(g)

Accepted Answer

A)   raising the temperature
B)   adding SO3
C)   removing O2
D)   all of the above
E)   none of the aboveF) None of the above
G) B) and D)

Question 11

Express the equilibrium constant for the following reaction. 3 CH3Cl(g) + 3/2 Cl2(g) ⇔ 3 CH2Cl2(g) + 3/2 H2(g)

Accepted Answer

A)   K = 3Cl(g) + 3/2 Cl2(g) ⇔ 3 CH2Cl2(g) + 3/2 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
B)   K = 3Cl(g) + 3/2 Cl2(g) ⇔ 3 CH2Cl2(g) + 3/2 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
C)   K = 3Cl(g) + 3/2 Cl2(g) ⇔ 3 CH2Cl2(g) + 3/2 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
D)   K = 3Cl(g) + 3/2 Cl2(g) ⇔ 3 CH2Cl2(g) + 3/2 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
E)   K = 3Cl(g) + 3/2 Cl2(g) ⇔ 3 CH2Cl2(g) + 3/2 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >F) A) and C)
G) B) and E) A

Question 12

The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO2(g) + O2(g) ⇌ 2 SO3(g) .
If initial concentrations are [SO2] = 1.20 M,[O2] = 0.45 M,and [SO3] = 1.80 M,the system is

Accepted Answer

A)   at equilibrium.
B)   not at equilibrium and will remain in an unequilibrated state.
C)   not at equilibrium and will shift to the left to achieve an equilibrium state.
D)   not at equilibrium and will shift to the right to achieve an equilibrium state.E) All of the above
F) A) and B)

Question 13

In a reaction mixture containing only products,what is the value of Q?

Accepted Answer

A)   -1
B)   1
C)   ∞
D)   0
E)   It cannot be determined without concentrations.F) C) and D)
G) A) and E)

Question 14

Express the equilibrium constant for the following reaction. 10 NH3(g) ⇔ 5 N2(g) + 15 H2(g)

Accepted Answer

A)   K = 3(g) ⇔ 5 N2(g) + 15 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
B)   K = 3(g) ⇔ 5 N2(g) + 15 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
C)   K = 3(g) ⇔ 5 N2(g) + 15 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
D)   K = 3(g) ⇔ 5 N2(g) + 15 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
E)   K = 3(g) ⇔ 5 N2(g) + 15 H2(g)  
A)   K =   
B)   K =   
C)   K =   
D)   K =   
E)   K =  " class="answers-bank-image d-inline" rel="preload" >F) A) and E)
G) A) and C)

Question 15

Chemical equilibrium is the result of

Accepted Answer

A)   all of the reactants being converted into products.
B)   stoppage of further reaction.
C)   formation of products equal in mass to the mass of the reactants.
D)   opposing reactions attaining equal rates.
E)   a loss of pressure in the system.F) B) and E)
G) B) and C)

Question 16

What is Δn for the following equation in relating Kc to Kp?
SO3(g) + NO(g) ⇌ SO2(g) + NO2(g)

Accepted Answer

A)   0
B)   -1
C)   -2
D)   2
E)   1F) D) and E)
G) A) and B)

Question 17

Can the Kp and Kc for a reaction ever have the same value?
 Why or why not?

Accepted Answer

Yes,they can have the same value.Since K...

Question 18

Identify the change that will always shift the equilibrium to the right.

Accepted Answer

A)   remove reactant
B)   increase product
C)   remove product
D)   increase pressure
E)   increase volumeF) A) and D)
G) A) and C) C

Question 19

What is △n for the following equation in relating Kc to Kp?
2 Rb(s) + 2 H2O(l) ⇌ 2 RbOH(aq) + H2(g)

Accepted Answer

A)   3
B)   -1
C)   -2
D)   2
E)   1F) C) and D)
G) B) and D)

Question 20

At a certain temperature,Kc equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) .
If a 3.50-L flask contains 0.400 mol of CO2 and 0.100 mol of O2 at equilibrium,how many moles of CO are also present in the flask?

Accepted Answer

A)   0.700 mol
B)   0.200 mol
C)   0.107 mol
D)   0.0114 molE) A) and B)
F) B) and C)

Exam 16: Chemical Equilibrium

An equilibrium mixture of CO,O2 and CO2 at a certain temperature contains 0.0010 M CO2 and 0.0015 M O2.At this temperature,Kc equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) . What is the equilibrium concentration of CO?

Correct AnswerverifiedShow Answer

The reaction below has a Kp value of 41.What is the value of Kc for this reaction at 400 K? N2(g) + 3 H2(g) ⇌ 2 NH3(g)

Correct AnswerverifiedShow Answer

Give the direction of the reaction,if K >> 1.

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Consider the following reaction: CO2(g) + C(graphite) ⇌ 2 CO(g) A reaction mixture initially contains 0.56 atm CO2 and 0.32 atm CO.Determine the equilibrium pressure of CO if Kp for the reaction at this temperature is 2.25.

Correct AnswerverifiedShow Answer

In a reaction mixture containing reactants and products,each at a concentration of 1M,what is the value of Q?

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At a certain temperature,nitrogen and hydrogen react to form ammonia: N2(g) + 3 H2(g) ⇌ 2 NH3(g) . When initial amounts of N2,H2,and NH3 are mixed,the concentration of NH3 increases.Which statement below is TRUE?

Correct AnswerverifiedShow Answer

The equilibrium constant is given for two of the reactions below.Determine the value of the missing equilibrium constant. A(g) + 2B(g) ⇌ AB2(g) Kc = 59 AB2(g) + B(g) ⇌ AB3(g) Kc = ? A(g) + 3B(g) ⇌ AB3(g) Kc = 478

Correct AnswerverifiedShow Answer

Express the equilibrium constant for the following reaction. 2 N2(g) + 6 H2(g) ⇔ 4 NH3(g)

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The Kp for the reaction below is 1.49 × 108 at 100.0°C: CO(g) + Cl2(g) → COCl2(g) In an equilibrium mixture of the three gases,PCO = = 4.44 × 10-4 atm.The partial pressure of the product,phosgene (COCl2) ,is ________ atm.

Correct AnswerverifiedA

The following reaction is exothermic.Which change will shift the equilibrium to the left? 2 SO2(g) + O2(g) ⇌ 2 SO3(g)

Correct AnswerverifiedShow Answer

Express the equilibrium constant for the following reaction. 3 CH3Cl(g) + 3/2 Cl2(g) ⇔ 3 CH2Cl2(g) + 3/2 H2(g)

Correct AnswerverifiedA

The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO2(g) + O2(g) ⇌ 2 SO3(g) . If initial concentrations are [SO2] = 1.20 M,[O2] = 0.45 M,and [SO3] = 1.80 M,the system is

Correct AnswerverifiedShow Answer

In a reaction mixture containing only products,what is the value of Q?

Correct AnswerverifiedShow Answer

Express the equilibrium constant for the following reaction. 10 NH3(g) ⇔ 5 N2(g) + 15 H2(g)

Correct AnswerverifiedShow Answer

Chemical equilibrium is the result of

Correct AnswerverifiedShow Answer

What is Δn for the following equation in relating Kc to Kp? SO3(g) + NO(g) ⇌ SO2(g) + NO2(g)

Correct AnswerverifiedShow Answer

Can the Kp and Kc for a reaction ever have the same value? Why or why not?

Correct AnswerverifiedYes,they can have the same value.Since K...View AnswerShow Answer

Identify the change that will always shift the equilibrium to the right.

Correct AnswerverifiedC

What is △n for the following equation in relating Kc to Kp? 2 Rb(s) + 2 H2O(l) ⇌ 2 RbOH(aq) + H2(g)

Correct AnswerverifiedShow Answer

At a certain temperature,Kc equals 1.4 × 102 for the reaction: 2 CO(g) + O2(g) ⇌ 2 CO2(g) . If a 3.50-L flask contains 0.400 mol of CO2 and 0.100 mol of O2 at equilibrium,how many moles of CO are also present in the flask?

Correct AnswerverifiedShow Answer

An equilibrium mixture of CO,O₂ and CO₂ at a certain temperature contains 0.0010 M CO₂ and 0.0015 M O₂.At this temperature,K_c equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) . What is the equilibrium concentration of CO?

Correct Answer
verified

The reaction below has a K_p value of 41.What is the value of K_c for this reaction at 400 K? N₂(g) + 3 H₂(g) ⇌ 2 NH₃(g)

Correct Answer
verified

Correct Answer
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Consider the following reaction: CO₂(g) + C(graphite) ⇌ 2 CO(g) A reaction mixture initially contains 0.56 atm CO₂ and 0.32 atm CO.Determine the equilibrium pressure of CO if K_p for the reaction at this temperature is 2.25.

Correct Answer
verified

Correct Answer
verified

At a certain temperature,nitrogen and hydrogen react to form ammonia: N₂(g) + 3 H₂(g) ⇌ 2 NH₃(g) . When initial amounts of N₂,H₂,and NH₃ are mixed,the concentration of NH₃ increases.Which statement below is TRUE?

Correct Answer
verified

The equilibrium constant is given for two of the reactions below.Determine the value of the missing equilibrium constant. A(g) + 2B(g) ⇌ AB₂(g) Kc = 59 AB₂(g) + B(g) ⇌ AB₃(g) K_c = ? A(g) + 3B(g) ⇌ AB₃(g) K_c = 478

Correct Answer
verified

Express the equilibrium constant for the following reaction. 2 N₂(g) + 6 H₂(g) ⇔ 4 NH₃(g)

Correct Answer
verified

The K_p for the reaction below is 1.49 × 10⁸ at 100.0°C: CO(g) + Cl₂(g) → COCl₂(g) In an equilibrium mixture of the three gases,P_CO = = 4.44 × 10^-4 atm.The partial pressure of the product,phosgene (COCl₂) ,is ________ atm.

Correct Answer
verified
A

The following reaction is exothermic.Which change will shift the equilibrium to the left? 2 SO₂(g) + O₂(g) ⇌ 2 SO₃(g)

Correct Answer
verified

Express the equilibrium constant for the following reaction. 3 CH₃Cl(g) + 3/2 Cl₂(g) ⇔ 3 CH₂Cl₂(g) + 3/2 H_2(g)

Correct Answer
verified
A

The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO₂(g) + O₂(g) ⇌ 2 SO₃(g) . If initial concentrations are [SO₂] = 1.20 M,[O₂] = 0.45 M,and [SO₃] = 1.80 M,the system is

Correct Answer
verified

Correct Answer
verified

Express the equilibrium constant for the following reaction. 10 NH₃(g) ⇔ 5 N₂(g) + 15 H₂(g)

Correct Answer
verified

Correct Answer
verified

What is Δn for the following equation in relating K_c to K_p? SO₃(g) + NO(g) ⇌ SO₂(g) + NO₂(g)

Correct Answer
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Can the K_p and K_c for a reaction ever have the same value? Why or why not?

Correct Answer
verified
Yes,they can have the same value.Since K...
View Answer

Correct Answer
verified
C

What is △n for the following equation in relating K_c to K_p? 2 Rb(s) + 2 H₂O(l) ⇌ 2 RbOH(aq) + H₂(g)

Correct Answer
verified

At a certain temperature,K_c equals 1.4 × 10² for the reaction: 2 CO(g) + O₂(g) ⇌ 2 CO₂(g) . If a 3.50-L flask contains 0.400 mol of CO₂ and 0.100 mol of O₂ at equilibrium,how many moles of CO are also present in the flask?

Correct Answer
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