Question 1

If the system 3H2(g) + N2(g)  2NH3(g) is at equilibrium and more N2 is added, a net reaction that consumes some of the added N2 will occur until a new equilibrium is reached.

Accepted Answer

A) True 
 B)False  True

Question 2

Which reaction shown will have the highest concentration of products at equilibrium?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) C) and E)

Question 3

Hydrogen peroxide may decompose to form water and oxygen gas according to the following reaction. 2H2O2(g)  2O2(g)    2H2O(g)  + O2(g)  In a particular experiment, 1.75 moles of H2O2 were placed in a 2.5-L reaction chamber at 307ºC.After equilibrium was reached, 1.20 moles of H2O2 remained.What is K for the reaction? A) 2.0 × 10−4 B) 2.3 × 10−2 C) 2.4 × 10-3 D) 5.5 × 10−3 E) 3.9 × 10−4" class="answers-bank-image d-inline" rel="preload" > 2H2O(g)  + O2(g) 
In a particular experiment, 1.75 moles of H2O2 were placed in a 2.5-L reaction chamber at 307ºC.After equilibrium was reached, 1.20 moles of H2O2 remained.What is K for the reaction?

Accepted Answer

A)  2.0 × 10−4
B)  2.3 × 10−2
C)  2.4 × 10-3
D)  5.5 × 10−3
E)  3.9 × 10−4F) B) and E)
G) A) and E) B

Question 4

At 450°C, tert-butyl alcohol decomposes into water and isobutene.(CH3) 3COH(g)  3) 3COH(g)    (CH3) 2CCH2(g)  + H2O(g)  A reaction vessel contains these compounds at equilibrium.What will happen if the volume of the container is reduced by 50% at constant temperature? A) The forward reaction will proceed in order to reestablish equilibrium. B) The reverse reaction will proceed in order to reestablish equilibrium. C) No change occurs. D) The equilibrium constant will increase. E) The equilibrium constant will decrease." class="answers-bank-image d-inline" rel="preload" > (CH3) 2CCH2(g)  + H2O(g)  A reaction vessel contains these compounds at equilibrium.What will happen if the volume of the container is reduced by 50% at constant temperature?

Accepted Answer

A)  The forward reaction will proceed in order to reestablish equilibrium.
B)  The reverse reaction will proceed in order to reestablish equilibrium.
C)  No change occurs.
D)  The equilibrium constant will increase.
E)  The equilibrium constant will decrease.F) A) and B)
G) A) and C)

Question 5

Which reaction shown will have the highest concentration of reactants at equilibrium?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and E)
G) B) and C)

Question 6

A 6.0-L vessel was found to contain 1.0 mol BrCl3, 2.0 mol Br2 and 6.0 mol Cl2.What is the equilibrium constant, K, for this equilibrium mixture for the reaction 2BrCl3(g)   Br2(g)  + 3Cl2(g) ?

Accepted Answer

A)  0.014
B)  108
C)  18
D)  12
E)  432F) C) and E)
G) B) and E)

Question 7

Compounds A, B, and C react according to the following equation.3A(g)  + 2B(g)   2C(g)  At 100°C a mixture of these gases at equilibrium showed that [A] = 0.855 M, [B] = 1.23 M, and [C] = 1.75 M.What is the value of K for this reaction?

Accepted Answer

A)  0.309
B)  0.601
C)  1.66
D)  2.25
E)  3.24F) A) and C)
G) B) and D)

Question 8

For the nitrogen fixation reaction, 3H2(g)  + N2(g)  2(g)  + N2(g)    2NH3(g) , K = 6.0 × 10−2 at 500°C.If 0.250 M H2 and 0.050 M NH3 are present at equilibrium, what is the equilibrium concentration of N2? A) 3.3 M B) 2.7 M C) 0.20 M D) 0.083 M E) 0.058 M" class="answers-bank-image d-inline" rel="preload" > 2NH3(g) , K = 6.0 × 10−2 at 500°C.If 0.250 M H2 and 0.050 M NH3 are present at equilibrium, what is the equilibrium concentration of N2?

Accepted Answer

A)  3.3 M
B)  2.7 M
C)  0.20 M
D)  0.083 M
E)  0.058 MF) All of the above
G) A) and D)

Question 9

The equilibrium constant expression for the reaction CuO(s) + H2(g)  Cu(s) + H2O(g) is K = [H2]/[H2O].

Accepted Answer

A) True 
 B)False

Question 10

At elevated temperatures, hydrogen iodide may decompose to form hydrogen gas and iodine gas, as follows. 2HI(g)  2(g)  + I2(g)  In a particular experiment, the concentrations at equilibrium were measured to be [HI] = 0.85 mol/L, [I2] = 0.60 mol/L, and [H2] = 0.27 mol/L.What is K for the above reaction? A) 5.3 B) 0.22 C) 4.5 D) 0.19 E) 1.6× 102" class="answers-bank-image d-inline" rel="preload" > H2(g)  + I2(g) 
In a particular experiment, the concentrations at equilibrium were measured to be [HI] = 0.85 mol/L, [I2] = 0.60 mol/L, and [H2] = 0.27 mol/L.What is K for the above reaction?

Accepted Answer

A)  5.3
B)  0.22
C)  4.5
D)  0.19
E)  1.6× 102F) A) and D)
G) A) and C)

Question 11

Determine the balanced chemical equation that corresponds to the given equilibrium expression.

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and E)
G) B) and C)

Question 12

Which substances are included in the equilibrium constant expression, Kc?

Accepted Answer

A)  Only pure solids
B)  Only pure liquids
C)  Only pure solids and liquids
D)  Only gases and dissolved substances
E)  All participating substancesF) D) and E)
G) B) and D)

Question 13

Write the equilibrium constant expression for the reaction shown.

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and C)
G) A) and B)

Question 14

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

Accepted Answer

A) True 
 B)False  False

Question 15

A mixture of 0.500 mole of carbon monoxide and 0.400 mole of bromine was placed into a rigid 1.00-L container and the system was allowed to come to equilibrium.The equilibrium concentration of COBr2 was 0.233 M.What is K for this reaction? CO(g)  + Br2(g)  2 was 0.233 M.What is K for this reaction? CO(g)  + Br2(g)    COBr2(g)  A) 5.23 B) 2.14 C) 1.17 D) 0.467 E) 0.191" class="answers-bank-image d-inline" rel="preload" > COBr2(g)

Accepted Answer

A)  5.23
B)  2.14
C)  1.17
D)  0.467
E)  0.191F) A) and D)
G) All of the above

Question 16

Write the equilibrium constant expression for the reaction shown. 2NOCl(g)   ⇌ 2NO(g)  + Cl2(g)

Accepted Answer

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

Question 17

What is defined as a fraction with equilibrium product concentrations in the numerator and equilibrium reactant concentrations in the denominator and each concentration raised to a power equal to the corresponding stoichiometric coefficient in the balanced chemical equation?

Accepted Answer

A)  Reversibility expression
B)  Reaction expression
C)  Equilibrium expression
D)  Product quotient
E)  Mass actionF) A) and B)
G) None of the above

Question 18

When the following reaction is at equilibrium 2NOCl(g)  2NO(g) + Cl2(g)
then [NO]2 [Cl2] = K [NOCl]2.

Accepted Answer

A) True 
 B)False

Question 19

At 35ºC, the equilibrium constant for the reaction 2NOCl(g)  2(g)  is K = 1.6 × 10−5.An equilibrium mixture was found to have the following concentrations of Cl2 and NOCl: [Cl2] = 1.2 × 10−2 M; [NOCl] = 2.8 × 10−1 M.Calculate the concentration of NO(g)  at equilibrium. A) 1.0 × 10−4 M B) 1.0 × 10−2 M C) 2.8 × 10−1 M D) 2.4 × 10−2 M E) 1.6 × 10−3 M" class="answers-bank-image d-inline" rel="preload" > 2NO(g)  + Cl2(g)  is K = 1.6 × 10−5.An equilibrium mixture was found to have the following concentrations of Cl2 and NOCl: [Cl2] = 1.2 × 10−2 M; [NOCl] = 2.8 × 10−1 M.Calculate the concentration of NO(g)  at equilibrium.

Accepted Answer

A)  1.0 × 10−4 M
B)  1.0 × 10−2 M
C)  2.8 × 10−1 M
D)  2.4 × 10−2 M
E)  1.6 × 10−3 MF) D) and E)
G) A) and B)

Question 20

Determine the balanced chemical equation that corresponds to the given equilibrium expression.

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and E)
G) C) and D)

Exam 13: Equilibrium

If the system 3H₂(g) + N₂(g) 2NH₃(g) is at equilibrium and more N₂ is added, a net reaction that consumes some of the added N₂ will occur until a new equilibrium is reached.

Correct Answer
verified
True

Which reaction shown will have the highest concentration of products at equilibrium?

Correct Answer
verified

Correct Answer
verified
B

At 450°C, tert-butyl alcohol decomposes into water and isobutene.(CH₃) ₃COH(g) (CH₃) ₂CCH₂(g) + H₂O(g) A reaction vessel contains these compounds at equilibrium.What will happen if the volume of the container is reduced by 50% at constant temperature?

Correct Answer
verified

Which reaction shown will have the highest concentration of reactants at equilibrium?

Correct Answer
verified

A 6.0-L vessel was found to contain 1.0 mol BrCl3, 2.0 mol Br2 and 6.0 mol Cl2.What is the equilibrium constant, K, for this equilibrium mixture for the reaction 2BrCl3(g) Br2(g) + 3Cl2(g) ?

Correct Answer
verified

Compounds A, B, and C react according to the following equation.3A(g) + 2B(g) 2C(g) At 100°C a mixture of these gases at equilibrium showed that [A] = 0.855 M, [B] = 1.23 M, and [C] = 1.75 M.What is the value of K for this reaction?

Correct Answer
verified

For the nitrogen fixation reaction, 3H₂(g) + N₂(g) 2NH₃(g) , K = 6.0 × 10⁻² at 500°C.If 0.250 M H₂ and 0.050 M NH₃ are present at equilibrium, what is the equilibrium concentration of N₂?

Correct Answer
verified

The equilibrium constant expression for the reaction CuO(s) + H₂(g) Cu(s) + H₂O(g) is K = [H₂]/[H₂O].

Correct Answer
verified

Correct Answer
verified

Determine the balanced chemical equation that corresponds to the given equilibrium expression.

Correct Answer
verified

Which substances are included in the equilibrium constant expression, K_c?

Correct Answer
verified

Write the equilibrium constant expression for the reaction shown.

Correct Answer
verified

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

Correct Answer
verified
False

A mixture of 0.500 mole of carbon monoxide and 0.400 mole of bromine was placed into a rigid 1.00-L container and the system was allowed to come to equilibrium.The equilibrium concentration of COBr₂ was 0.233 M.What is K for this reaction? CO(g) + Br₂(g) COBr₂(g)

Correct Answer
verified

Write the equilibrium constant expression for the reaction shown. 2NOCl(g) ⇌ 2NO(g) + Cl₂(g)

Correct Answer
verified

What is defined as a fraction with equilibrium product concentrations in the numerator and equilibrium reactant concentrations in the denominator and each concentration raised to a power equal to the corresponding stoichiometric coefficient in the balanced chemical equation?

Correct Answer
verified

When the following reaction is at equilibrium 2NOCl(g) 2NO(g) + Cl₂(g) then [NO]² [Cl₂] = K [NOCl]².

Correct Answer
verified

At 35ºC, the equilibrium constant for the reaction 2NOCl(g) 2NO(g) + Cl₂(g) is K = 1.6 × 10⁻⁵.An equilibrium mixture was found to have the following concentrations of Cl₂ and NOCl: [Cl₂] = 1.2 × 10⁻² M; [NOCl] = 2.8 × 10⁻¹ M.Calculate the concentration of NO(g) at equilibrium.

Correct Answer
verified

Determine the balanced chemical equation that corresponds to the given equilibrium expression.

Correct Answer
verified

Exam 13: Equilibrium

If the system 3H2(g) + N2(g) 2NH3(g) is at equilibrium and more N2 is added, a net reaction that consumes some of the added N2 will occur until a new equilibrium is reached.

Correct AnswerverifiedTrue

Which reaction shown will have the highest concentration of products at equilibrium?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedB

At 450°C, tert-butyl alcohol decomposes into water and isobutene.(CH3) 3COH(g) (CH3) 2CCH2(g) + H2O(g) A reaction vessel contains these compounds at equilibrium.What will happen if the volume of the container is reduced by 50% at constant temperature?

Correct AnswerverifiedShow Answer

Which reaction shown will have the highest concentration of reactants at equilibrium?

Correct AnswerverifiedShow Answer

A 6.0-L vessel was found to contain 1.0 mol BrCl3, 2.0 mol Br2 and 6.0 mol Cl2.What is the equilibrium constant, K, for this equilibrium mixture for the reaction 2BrCl3(g) Br2(g) + 3Cl2(g) ?

Correct AnswerverifiedShow Answer

Compounds A, B, and C react according to the following equation.3A(g) + 2B(g) 2C(g) At 100°C a mixture of these gases at equilibrium showed that [A] = 0.855 M, [B] = 1.23 M, and [C] = 1.75 M.What is the value of K for this reaction?

Correct AnswerverifiedShow Answer

For the nitrogen fixation reaction, 3H2(g) + N2(g) 2NH3(g) , K = 6.0 × 10−2 at 500°C.If 0.250 M H2 and 0.050 M NH3 are present at equilibrium, what is the equilibrium concentration of N2?

Correct AnswerverifiedShow Answer

The equilibrium constant expression for the reaction CuO(s) + H2(g) Cu(s) + H2O(g) is K = [H2]/[H2O].

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Determine the balanced chemical equation that corresponds to the given equilibrium expression.

Correct AnswerverifiedShow Answer

Which substances are included in the equilibrium constant expression, Kc?

Correct AnswerverifiedShow Answer

Write the equilibrium constant expression for the reaction shown.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedFalse

A mixture of 0.500 mole of carbon monoxide and 0.400 mole of bromine was placed into a rigid 1.00-L container and the system was allowed to come to equilibrium.The equilibrium concentration of COBr2 was 0.233 M.What is K for this reaction? CO(g) + Br2(g) COBr2(g)

Correct AnswerverifiedShow Answer

Write the equilibrium constant expression for the reaction shown. 2NOCl(g) ⇌ 2NO(g) + Cl2(g)

Correct AnswerverifiedShow Answer

What is defined as a fraction with equilibrium product concentrations in the numerator and equilibrium reactant concentrations in the denominator and each concentration raised to a power equal to the corresponding stoichiometric coefficient in the balanced chemical equation?

Correct AnswerverifiedShow Answer

When the following reaction is at equilibrium 2NOCl(g) 2NO(g) + Cl2(g) then [NO]2 [Cl2] = K [NOCl]2.

Correct AnswerverifiedShow Answer

At 35ºC, the equilibrium constant for the reaction 2NOCl(g) 2NO(g) + Cl2(g) is K = 1.6 × 10−5.An equilibrium mixture was found to have the following concentrations of Cl2 and NOCl: [Cl2] = 1.2 × 10−2 M; [NOCl] = 2.8 × 10−1 M.Calculate the concentration of NO(g) at equilibrium.

Correct AnswerverifiedShow Answer

Determine the balanced chemical equation that corresponds to the given equilibrium expression.

Correct AnswerverifiedShow Answer

If the system 3H₂(g) + N₂(g) 2NH₃(g) is at equilibrium and more N₂ is added, a net reaction that consumes some of the added N₂ will occur until a new equilibrium is reached.

Correct Answer
verified
True

Correct Answer
verified

Correct Answer
verified
B

At 450°C, tert-butyl alcohol decomposes into water and isobutene.(CH₃) ₃COH(g) (CH₃) ₂CCH₂(g) + H₂O(g) A reaction vessel contains these compounds at equilibrium.What will happen if the volume of the container is reduced by 50% at constant temperature?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For the nitrogen fixation reaction, 3H₂(g) + N₂(g) 2NH₃(g) , K = 6.0 × 10⁻² at 500°C.If 0.250 M H₂ and 0.050 M NH₃ are present at equilibrium, what is the equilibrium concentration of N₂?

Correct Answer
verified

The equilibrium constant expression for the reaction CuO(s) + H₂(g) Cu(s) + H₂O(g) is K = [H₂]/[H₂O].

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which substances are included in the equilibrium constant expression, K_c?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
False

A mixture of 0.500 mole of carbon monoxide and 0.400 mole of bromine was placed into a rigid 1.00-L container and the system was allowed to come to equilibrium.The equilibrium concentration of COBr₂ was 0.233 M.What is K for this reaction? CO(g) + Br₂(g) COBr₂(g)

Correct Answer
verified

Write the equilibrium constant expression for the reaction shown. 2NOCl(g) ⇌ 2NO(g) + Cl₂(g)

Correct Answer
verified

Correct Answer
verified

When the following reaction is at equilibrium 2NOCl(g) 2NO(g) + Cl₂(g) then [NO]² [Cl₂] = K [NOCl]².

Correct Answer
verified

At 35ºC, the equilibrium constant for the reaction 2NOCl(g) 2NO(g) + Cl₂(g) is K = 1.6 × 10⁻⁵.An equilibrium mixture was found to have the following concentrations of Cl₂ and NOCl: [Cl₂] = 1.2 × 10⁻² M; [NOCl] = 2.8 × 10⁻¹ M.Calculate the concentration of NO(g) at equilibrium.

Correct Answer
verified

Correct Answer
verified