Question 1

Express the equilibrium constant for the following reaction. P4(s) + 5 O2(g) ⇌ P4O10(s)

Accepted Answer

A)   K = 4(s) + 5 O2(g) ⇌ P4O10(s)  
A)   K =   
B)   K =   
C)   K = [O2]-5 
D)   K = [O2]5 
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
B)   K = 4(s) + 5 O2(g) ⇌ P4O10(s)  
A)   K =   
B)   K =   
C)   K = [O2]-5 
D)   K = [O2]5 
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
C)   K = [O2]-5
D)   K = [O2]5
E)   K = 4(s) + 5 O2(g) ⇌ P4O10(s)  
A)   K =   
B)   K =   
C)   K = [O2]-5 
D)   K = [O2]5 
E)   K =  " class="answers-bank-image d-inline" rel="preload" >

Question 2

Match between columns Premises: K << 1 K ≈ 1 Q > K Q < K Q = K Q >> 1

Accepted Answer

The Answer of reaction is at equilibrium and reaction will is...

Question 3

Express the equilibrium constant for the following reaction. 2 Na(s) + 2 H2O(l) ⇌ 2 NaOH(aq) + H2(g)

Accepted Answer

A)   K = 2O(l) ⇌ 2 NaOH(aq) + H2(g)  
A)   K =   
B)   K = [H2][NaOH]-2 
C)   K =   
D)   K = [H2][NaOH]2 
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
B)   K = [H2][NaOH]-2
C)   K = 2O(l) ⇌ 2 NaOH(aq) + H2(g)  
A)   K =   
B)   K = [H2][NaOH]-2 
C)   K =   
D)   K = [H2][NaOH]2 
E)   K =  " class="answers-bank-image d-inline" rel="preload" >
D)   K = [H2][NaOH]2
E)   K = 2O(l) ⇌ 2 NaOH(aq) + H2(g)  
A)   K =   
B)   K = [H2][NaOH]-2 
C)   K =   
D)   K = [H2][NaOH]2 
E)   K =  " class="answers-bank-image d-inline" rel="preload" >

Question 4

What is △n for the following equation in relating Kc to Kp?
Li BrO3(s) ⇌ Li BrO(s) + O2(g)

Accepted Answer

A)   3
B)   -1
C)   -2
D)   2
E)   1

Question 5

For the reaction: N2(g) + 2 O2(g) ⇌ 2 NO2(g) ,Kc = 8.3 × 10-10 at 25°C.What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas?

Accepted Answer

A)   2.1 × 10-10 M
B)   4.2 × 10-10 M
C)   2.4 × 109 M
D)   4.8 × 109 M

Question 6

Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [N2]eq = 3.6 M,[O2]eq = 4.1 M,[N2O]eq = 3.3 × 10-18 M. 2 N2(g) + O2(g) ⇌ 2 N2O(g)

Accepted Answer

A)   2.2 × 10-19
B)   4.5 × 1018
C)   2.0 × 10-37
D)   5.0 × 1036
E)   4.9 × 10-17

Question 7

Which of the following statements is TRUE?

Accepted Answer

A)   Dynamic equilibrium occurs when the rate of the forward reaction equals the rate of the reverse reaction.
B)   The equilibrium constant for the forward reaction is equal to the equilibrium constant for the reverse reaction.
C)   A reaction quotient (Q)  larger than the equilibrium constant (K)  means that the reaction will favor the production of more products.
D)   Dynamic equilibrium indicates that the amount of reactants and products are equal.
E)   All of the above are true.

Question 8

What is Δn for the following equation in relating Kc to Kp?
CH4(g) + H2O(g) ⇌ CO(g) + 3 H2(g)

Accepted Answer

A)   -5
B)   -1
C)   -2
D)   2
E)   1

Question 9

At a certain temperature the equilibrium constant,Kc,equals 0.11 for the reaction: 2 ICl(g) ⇌ I2(g) + Cl2(g) .
What is the equilibrium concentration of ICl if 0.55 mol of I2 and 0.55 mol of Cl2 are initially mixed in a 2.0-L flask?

Accepted Answer

A)   0.17 M
B)   0.21 M
C)   0.33 M
D)   0.41 M

Question 10

Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [P4O10]eq = 2.000 moles,[P4]eq = 3.000 moles,[O2]eq = 4.000 M P4O10(s) ⇌ P4(s) + 5 O2(g)

Accepted Answer

A)   20.00
B)   4.000
C)   1.320
D)   1536
E)   1024

Question 11

Consider the following reaction: 2 H2O(g) + 2 SO2(g) ⇌ 2 H2S(g) + 3 O2(g) 
A reaction mixture initially contains 2.8 M H2O and 2.6 M SO2.Determine the equilibrium concentration of H2S if Kc for the reaction at this temperature is 1.3 × 10-6.

Accepted Answer

A)   0.045 M
B)   0.058 M
C)   0.028 M
D)   3.1 × 10-3 M
E)   0.12 M

Question 12

The following reaction is exothermic.What set of conditions will always lead to the equilibrium shifting to the left?
2 NO(g) + Br2(g) ⇌ 2 NOBr(g)

Accepted Answer

A)   decrease the volume, decrease the temperature
B)   increase the volume, decrease the temperature
C)   increase the volume, increase the temperature
D)   decrease the volume, increase the temperature
E)   none of the above

Question 13

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of H2O(g) . C2H4(g) + H2O(g) ⇌ C2H5OH(g) Kc = 9.0 × 103
[C2H4]eq = 0.015 M [C2H5OH]eq = 1.69 M

Accepted Answer

A)   9.9 × 10-7 M
B)   80. M
C)   1.0 M
D)   1.68 M
E)   0.013 M

Question 14

Consider the following reaction at equilibrium.What effect will increasing the pressure of the reaction mixture have on the system?
2 H2S(g) + 3 O2(g) ⇌ 2 H2O(g) + 2 SO2(g)

Accepted Answer

A)   The reaction will shift to the right in the direction of products.
B)   No effect will be observed.
C)   The reaction will shift to the left in the direction of reactants.
D)   The equilibrium constant will decrease.
E)   The equilibrium constant will increase.

Question 15

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of H2O(g) . 2 H2(g) + O2(g) ⇌ 2 H2O(g) Kc = 5.50 × 102
[H2] = 0.480 M [O2] = 0.310 M

Accepted Answer

A)   4.23 × 10-3 M
B)   0.426 M
C)   6.27 M
D)   39.3 M
E)   5.52 × 106 M

Question 16

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium pressure of CO. CO(g) + 2 H2(g) ⇌ CH3OH(l) Kp = 2.25 × 104
P(H2) eq = 0.52 atm

Accepted Answer

A)   8.3 × 104 atm
B)   1.2 × 10-5 atm
C)   6.25 × 10-3 atm
D)   8.5 × 10-5 atm
E)   1.6 × 10-4 atm

Question 17

Consider the following reaction at equilibrium.What effect will increasing the temperature have on the system?
C3H8(g) + 5 O2(g) ⇌ 3 CO2(g) + 4 H2O(l) ΔH° = -2220 kJ

Accepted Answer

A)   The reaction will shift to the right in the direction of products.
B)   The reaction will shift to the left in the direction of reactants.
C)   The equilibrium constant will increase.
D)   The equilibrium constant will decrease.
E)   No effect will be observed.

Question 18

Determine the value of Kp for the following reaction if the equilibrium concentrations are as follows: P(CO) eq = 6.8 × 10-11 atm,P(O2) eq = 1.3 × 10-3 atm,P(CO2) eq = 0.041 atm. 2 CO(g) + O2(g) ⇌ 2 CO2(g)

Accepted Answer

A)   3.6 × 10-21
B)   2.8 × 1020
C)   4.6 × 1011
D)   2.2 × 10-12
E)   3.6 × 10-15

Question 19

Why is an equilibrium constant unitless?

Accepted Answer

Each concentration or pressure for a rea...

Question 20

Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [PI5]eq = 0.56 M,[PI3]eq = 0.23 M,[I2]eq = 5.5 M. PI5(g) ⇌ PI3(g) + I2(g)

Accepted Answer

A)   2.3
B)   0.93
C)   0.44
D)   1.1
E)   0.76

Exam 16: Chemical Equilibrium

Which of the following statements is TRUE?

Correct Answer
verified

Consider the following reaction at equilibrium.What effect will increasing the pressure of the reaction mixture have on the system? 2 H₂S(g) + 3 O₂(g) ⇌ 2 H₂O(g) + 2 SO₂(g)

Correct Answer
verified

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of H₂O(g) . 2 H₂(g) + O₂(g) ⇌ 2 H₂O(g) K_c = 5.50 × 10² [H₂] = 0.480 M [O₂] = 0.310 M

Correct Answer
verified

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium pressure of CO. CO(g) + 2 H₂(g) ⇌ CH₃OH(l) K_p = 2.25 × 10⁴ P(H₂) _eq = 0.52 atm

Correct Answer
verified

For the reaction: N₂(g) + 2 O₂(g) ⇌ 2 NO₂(g) ,K_c = 8.3 × 10^-10 at 25°C.What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is twice the concentration of O₂ gas?

Correct Answer
verified

What is Δn for the following equation in relating K_c to K_p? CH₄(g) + H₂O(g) ⇌ CO(g) + 3 H₂(g)

Correct Answer
verified

Why is an equilibrium constant unitless?

Correct Answer
verified
Each concentration or pressure for a rea...
View Answer

What is △n for the following equation in relating K_c to K_p? Li BrO₃(s) ⇌ Li BrO(s) + O₂(g)

Correct Answer
verified

Match the following.

Express the equilibrium constant for the following reaction. P₄(s) + 5 O₂(g) ⇌ P₄O₁₀(s)

Correct Answer
verified

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of H₂O(g) . C₂H₄(g) + H₂O(g) ⇌ C₂H₅OH(g) K_c = 9.0 × 10³ [C₂H₄]_eq = 0.015 M [C₂H₅OH]_eq = 1.69 M

Correct Answer
verified

At a certain temperature the equilibrium constant,K_c,equals 0.11 for the reaction: 2 ICl(g) ⇌ I₂(g) + Cl₂(g) . What is the equilibrium concentration of ICl if 0.55 mol of I₂ and 0.55 mol of Cl₂ are initially mixed in a 2.0-L flask?

Correct Answer
verified

Determine the value of K_c for the following reaction if the equilibrium concentrations are as follows: [P₄O₁₀]_eq= 2.000 moles,[P₄]_eq = 3.000 moles,[O₂]_eq = 4.000 M P₄O₁₀(s) ⇌ P₄(s) + 5 O₂(g)

Correct Answer
verified

Determine the value of K_c for the following reaction if the equilibrium concentrations are as follows: [N₂]_eq = 3.6 M,[O₂]_eq = 4.1 M,[N₂O]_eq = 3.3 × 10^-18 M. 2 N₂(g) + O₂(g) ⇌ 2 N₂O(g)

Correct Answer
verified

Consider the following reaction: 2 H₂O(g) + 2 SO₂(g) ⇌ 2 H₂S(g) + 3 O₂(g) A reaction mixture initially contains 2.8 M H₂O and 2.6 M SO₂.Determine the equilibrium concentration of H₂S if K_c for the reaction at this temperature is 1.3 × 10^-6.

Correct Answer
verified

Determine the value of K_c for the following reaction if the equilibrium concentrations are as follows: [PI₅]_eq = 0.56 M,[PI₃]_eq = 0.23 M,[I₂]_eq = 5.5 M. PI₅(g) ⇌ PI₃(g) + I₂(g)

Correct Answer
verified

Consider the following reaction at equilibrium.What effect will increasing the temperature have on the system? C₃H₈(g) + 5 O₂(g) ⇌ 3 CO₂(g) + 4 H₂O(l) ΔH° = -2220 kJ

Correct Answer
verified

Determine the value of K_p for the following reaction if the equilibrium concentrations are as follows: P(CO) _eq = 6.8 × 10^-11 atm,P(O₂) _eq = 1.3 × 10^-3 atm,P(CO₂) _eq = 0.041 atm. 2 CO(g) + O₂(g) ⇌ 2 CO₂(g)

Correct Answer
verified

Express the equilibrium constant for the following reaction. 2 Na(s) + 2 H₂O(l) ⇌ 2 NaOH(aq) + H₂(g)

Correct Answer
verified

The following reaction is exothermic.What set of conditions will always lead to the equilibrium shifting to the left? 2 NO(g) + Br₂(g) ⇌ 2 NOBr(g)

Correct Answer
verified

Exam 16: Chemical Equilibrium

Which of the following statements is TRUE?

Correct AnswerverifiedShow Answer

Consider the following reaction at equilibrium.What effect will increasing the pressure of the reaction mixture have on the system? 2 H2S(g) + 3 O2(g) ⇌ 2 H2O(g) + 2 SO2(g)

Correct AnswerverifiedShow Answer

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of H2O(g) . 2 H2(g) + O2(g) ⇌ 2 H2O(g) Kc = 5.50 × 102 [H2] = 0.480 M [O2] = 0.310 M

Correct AnswerverifiedShow Answer

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium pressure of CO. CO(g) + 2 H2(g) ⇌ CH3OH(l) Kp = 2.25 × 104 P(H2) eq = 0.52 atm

Correct AnswerverifiedShow Answer

For the reaction: N2(g) + 2 O2(g) ⇌ 2 NO2(g) ,Kc = 8.3 × 10-10 at 25°C.What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas?

Correct AnswerverifiedShow Answer

What is Δn for the following equation in relating Kc to Kp? CH4(g) + H2O(g) ⇌ CO(g) + 3 H2(g)

Correct AnswerverifiedShow Answer

Why is an equilibrium constant unitless?

Correct AnswerverifiedEach concentration or pressure for a rea...View AnswerShow Answer

What is △n for the following equation in relating Kc to Kp? Li BrO3(s) ⇌ Li BrO(s) + O2(g)

Correct AnswerverifiedShow Answer

Match the following.

Express the equilibrium constant for the following reaction. P4(s) + 5 O2(g) ⇌ P4O10(s)

Correct AnswerverifiedShow Answer

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of H2O(g) . C2H4(g) + H2O(g) ⇌ C2H5OH(g) Kc = 9.0 × 103 [C2H4]eq = 0.015 M [C2H5OH]eq = 1.69 M

Correct AnswerverifiedShow Answer

At a certain temperature the equilibrium constant,Kc,equals 0.11 for the reaction: 2 ICl(g) ⇌ I2(g) + Cl2(g) . What is the equilibrium concentration of ICl if 0.55 mol of I2 and 0.55 mol of Cl2 are initially mixed in a 2.0-L flask?

Correct AnswerverifiedShow Answer

Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [P4O10]eq = 2.000 moles,[P4]eq = 3.000 moles,[O2]eq = 4.000 M P4O10(s) ⇌ P4(s) + 5 O2(g)

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Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [N2]eq = 3.6 M,[O2]eq = 4.1 M,[N2O]eq = 3.3 × 10-18 M. 2 N2(g) + O2(g) ⇌ 2 N2O(g)

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Consider the following reaction: 2 H2O(g) + 2 SO2(g) ⇌ 2 H2S(g) + 3 O2(g) A reaction mixture initially contains 2.8 M H2O and 2.6 M SO2.Determine the equilibrium concentration of H2S if Kc for the reaction at this temperature is 1.3 × 10-6.

Correct AnswerverifiedShow Answer

Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [PI5]eq = 0.56 M,[PI3]eq = 0.23 M,[I2]eq = 5.5 M. PI5(g) ⇌ PI3(g) + I2(g)

Correct AnswerverifiedShow Answer

Consider the following reaction at equilibrium.What effect will increasing the temperature have on the system? C3H8(g) + 5 O2(g) ⇌ 3 CO2(g) + 4 H2O(l) ΔH° = -2220 kJ

Correct AnswerverifiedShow Answer

Determine the value of Kp for the following reaction if the equilibrium concentrations are as follows: P(CO) eq = 6.8 × 10-11 atm,P(O2) eq = 1.3 × 10-3 atm,P(CO2) eq = 0.041 atm. 2 CO(g) + O2(g) ⇌ 2 CO2(g)

Correct AnswerverifiedShow Answer

Express the equilibrium constant for the following reaction. 2 Na(s) + 2 H2O(l) ⇌ 2 NaOH(aq) + H2(g)

Correct AnswerverifiedShow Answer

The following reaction is exothermic.What set of conditions will always lead to the equilibrium shifting to the left? 2 NO(g) + Br2(g) ⇌ 2 NOBr(g)

Correct AnswerverifiedShow Answer

Correct Answer
verified

Consider the following reaction at equilibrium.What effect will increasing the pressure of the reaction mixture have on the system? 2 H₂S(g) + 3 O₂(g) ⇌ 2 H₂O(g) + 2 SO₂(g)

Correct Answer
verified

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of H₂O(g) . 2 H₂(g) + O₂(g) ⇌ 2 H₂O(g) K_c = 5.50 × 10² [H₂] = 0.480 M [O₂] = 0.310 M

Correct Answer
verified

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium pressure of CO. CO(g) + 2 H₂(g) ⇌ CH₃OH(l) K_p = 2.25 × 10⁴ P(H₂) _eq = 0.52 atm

Correct Answer
verified

For the reaction: N₂(g) + 2 O₂(g) ⇌ 2 NO₂(g) ,K_c = 8.3 × 10^-10 at 25°C.What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is twice the concentration of O₂ gas?

Correct Answer
verified

What is Δn for the following equation in relating K_c to K_p? CH₄(g) + H₂O(g) ⇌ CO(g) + 3 H₂(g)

Correct Answer
verified

Correct Answer
verified
Each concentration or pressure for a rea...
View Answer

What is △n for the following equation in relating K_c to K_p? Li BrO₃(s) ⇌ Li BrO(s) + O₂(g)

Correct Answer
verified

Express the equilibrium constant for the following reaction. P₄(s) + 5 O₂(g) ⇌ P₄O₁₀(s)

Correct Answer
verified

Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of H₂O(g) . C₂H₄(g) + H₂O(g) ⇌ C₂H₅OH(g) K_c = 9.0 × 10³ [C₂H₄]_eq = 0.015 M [C₂H₅OH]_eq = 1.69 M

Correct Answer
verified

At a certain temperature the equilibrium constant,K_c,equals 0.11 for the reaction: 2 ICl(g) ⇌ I₂(g) + Cl₂(g) . What is the equilibrium concentration of ICl if 0.55 mol of I₂ and 0.55 mol of Cl₂ are initially mixed in a 2.0-L flask?

Correct Answer
verified

Determine the value of K_c for the following reaction if the equilibrium concentrations are as follows: [P₄O₁₀]_eq= 2.000 moles,[P₄]_eq = 3.000 moles,[O₂]_eq = 4.000 M P₄O₁₀(s) ⇌ P₄(s) + 5 O₂(g)

Correct Answer
verified

Determine the value of K_c for the following reaction if the equilibrium concentrations are as follows: [N₂]_eq = 3.6 M,[O₂]_eq = 4.1 M,[N₂O]_eq = 3.3 × 10^-18 M. 2 N₂(g) + O₂(g) ⇌ 2 N₂O(g)

Correct Answer
verified

Consider the following reaction: 2 H₂O(g) + 2 SO₂(g) ⇌ 2 H₂S(g) + 3 O₂(g) A reaction mixture initially contains 2.8 M H₂O and 2.6 M SO₂.Determine the equilibrium concentration of H₂S if K_c for the reaction at this temperature is 1.3 × 10^-6.

Correct Answer
verified

Determine the value of K_c for the following reaction if the equilibrium concentrations are as follows: [PI₅]_eq = 0.56 M,[PI₃]_eq = 0.23 M,[I₂]_eq = 5.5 M. PI₅(g) ⇌ PI₃(g) + I₂(g)

Correct Answer
verified

Consider the following reaction at equilibrium.What effect will increasing the temperature have on the system? C₃H₈(g) + 5 O₂(g) ⇌ 3 CO₂(g) + 4 H₂O(l) ΔH° = -2220 kJ

Correct Answer
verified

Determine the value of K_p for the following reaction if the equilibrium concentrations are as follows: P(CO) _eq = 6.8 × 10^-11 atm,P(O₂) _eq = 1.3 × 10^-3 atm,P(CO₂) _eq = 0.041 atm. 2 CO(g) + O₂(g) ⇌ 2 CO₂(g)

Correct Answer
verified

Express the equilibrium constant for the following reaction. 2 Na(s) + 2 H₂O(l) ⇌ 2 NaOH(aq) + H₂(g)

Correct Answer
verified

The following reaction is exothermic.What set of conditions will always lead to the equilibrium shifting to the left? 2 NO(g) + Br₂(g) ⇌ 2 NOBr(g)

Correct Answer
verified