Question 1

Which is the correct equilibrium constant expression for the following reaction? 2C6H6(g) + 15O2(g)  6H6(g) + 15O2(g)    12CO2(g) + 6H2O(g)  A)    B)    C)    D)    E)   " class="answers-bank-image d-inline" rel="preload" > 12CO2(g) + 6H2O(g)

Accepted Answer

A)   6H6(g) + 15O2(g)    12CO2(g) + 6H2O(g)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   6H6(g) + 15O2(g)    12CO2(g) + 6H2O(g)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   6H6(g) + 15O2(g)    12CO2(g) + 6H2O(g)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   6H6(g) + 15O2(g)    12CO2(g) + 6H2O(g)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   6H6(g) + 15O2(g)    12CO2(g) + 6H2O(g)  
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) All of the above
G) C) and D)

Question 2

At 400ºC,Kc = 64 for the equilibrium H2(g) + I2(g)  c = 64 for the equilibrium H2(g) + I2(g)    2HI(g) .If 3.00 mol H2 and 3.00 mol I2 are introduced into an empty 4.0-L vessel,what is the equilibrium concentration of HI at 400ºC? A) 0.15 M B) 1.2 M C) 2.4 M D) 4.8 M E) 5.8 M" class="answers-bank-image d-inline" rel="preload" > 2HI(g) .If 3.00 mol H2 and 3.00 mol I2 are introduced into an empty 4.0-L vessel,what is the equilibrium concentration of HI at 400ºC?

Accepted Answer

A)  0.15 M
B)  1.2 M
C)  2.4 M
D)  4.8 M
E)  5.8 MF) B) and D)
G) C) and E)

Question 3

Which statement is correct?

Accepted Answer

A)  If K 
B)  If K > 1,lnK is negative,and ΔG° is positive,then the reaction is product favored.
C)  If K > 1,lnK is positive,and ΔG° is negative,then the reaction is product favored.
D)  If K > 1,lnK is negative,and ΔG° is negative,then the reaction is reactant favored.
E)  If K < 1,lnK is positive,and ΔG° is positive,then the reaction is reactant favored.F) B) and C)
G) C) and D)

Question 4

When the substances in the equation below are at equilibrium,at pressure,P,and temperature, T,the equilibrium can be shifted to favor the products by
CuO(s) + H2(g)  2(g)    H2O(g) + Cu(s) ΔHºrxn = -2.0 kJ/mol A) increasing the pressure by means of a moving piston at constant T. B) increasing the pressure by adding an inert gas such as nitrogen. C) decreasing the temperature. D) allowing some gases to escape at constant P and T. E) adding a more copper." class="answers-bank-image d-inline" rel="preload" > H2O(g) + Cu(s) ΔHºrxn = -2.0 kJ/mol

Accepted Answer

A)  increasing the pressure by means of a moving piston at constant T.
B)  increasing the pressure by adding an inert gas such as nitrogen.
C)  decreasing the temperature.
D)  allowing some gases to escape at constant P and T.
E)  adding a more copper.F) A) and B)
G) A) and C) C

Question 5

If one starts with pure NO2(g) at a pressure of 0.500 atm,the total pressure inside the reaction vessel when 2NO2(g)  2(g) at a pressure of 0.500 atm,the total pressure inside the reaction vessel when 2NO2(g)    2NO(g) + O2(g) reaches equilibrium is 0.674 atm. What is the equilibrium partial pressure of NO2? A) 0.152 atm B) 0.174 atm C) 0.200 atm D) 0.326 atm E) 0.500 atm" class="answers-bank-image d-inline" rel="preload" > 2NO(g) + O2(g) reaches equilibrium is 0.674 atm. What is the equilibrium partial pressure of NO2?

Accepted Answer

A)  0.152 atm
B)  0.174 atm
C)  0.200 atm
D)  0.326 atm
E)  0.500 atmF) A) and B)
G) B) and C)

Question 6

Consider the equilibrium equation C(s)+ O2(g)

Accepted Answer

CO₂(g),where ΔH_rxn = -393.5 kJ/mo...

Question 7

What is the expression for KP for the following reaction? A(g)  P for the following reaction? A(g)    B(g) + 2C(g)  A) KP =PB (PC) 2/PA B) KP =PA PB / (PC) 2 C) KP =PC (PB) 2/ PA D) KP =(PA) 2/PA E) KP =(PA) 2/PB" class="answers-bank-image d-inline" rel="preload" > B(g) + 2C(g)

Accepted Answer

A)  KP =PB (P
C)  2/PA
B)  KP =PA PB / (P
C)  2
C)  KP =PC (P
B)  2/ PA
D)  KP =(P
A)  2/PA
E)  KP =(P
A)  2/PBF) A) and C)
G) A) and B)

Question 8

Compounds A,B,and C react according to the following equation. 3A(g) + 2B(g)  c for this reaction? A) 0.309 B) 0.601 C) 1.66 D) 2.25 E) 3.24" class="answers-bank-image d-inline" rel="preload" > 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 Kc for this reaction?

Accepted Answer

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

Question 9

Suppose 15.00 g of solid ammonium hydrogen sulfide is introduced into a 500.-mL flask at 25°C,the flask is sealed,and the system is allowed to reach equilibrium.What is the partial pressure of ammonia in this flask if KP = 0.108 at 25°C for the following reaction?
NH4HS(s)  P = 0.108 at 25°C for the following reaction? NH4HS(s)    NH3(g) + H2S(g)  A) 0.657 atm B) 1.25 atm C) 0.329 atm D) 14.4 atm E) 2.50 atm" class="answers-bank-image d-inline" rel="preload" > NH3(g) + H2S(g)

Accepted Answer

A)  0.657 atm
B)  1.25 atm
C)  0.329 atm
D)  14.4 atm
E)  2.50 atmF) A) and E)
G) All of the above

Question 10

For the endothermic reaction A2(g)  2(g)    2A(g) ,a snapshot of an equilibrium mixture of A(g) and A2(g) may look as follows.(Each circle represents 1.0 mol of A atoms,and the volume of the box is 1.0 L.)    What is the equilibrium constant KP for this reaction at 298 K? (R = 0.08206 L • atm/K • mol)  A) 1.3 ×102 B) 65 C) 0.22 D) 16 E) 5.33" class="answers-bank-image d-inline" rel="preload" > 2A(g) ,a snapshot of an equilibrium mixture of A(g) and A2(g) may look as follows.(Each circle represents 1.0 mol of A atoms,and the volume of the box is 1.0 L.)  2(g)    2A(g) ,a snapshot of an equilibrium mixture of A(g) and A2(g) may look as follows.(Each circle represents 1.0 mol of A atoms,and the volume of the box is 1.0 L.)    What is the equilibrium constant KP for this reaction at 298 K? (R = 0.08206 L • atm/K • mol)  A) 1.3 ×102 B) 65 C) 0.22 D) 16 E) 5.33" class="answers-bank-image d-inline" rel="preload" > What is the equilibrium constant KP for this reaction at 298 K? (R = 0.08206 L • atm/K • mol)

Accepted Answer

A)  1.3 ×102
B)  65
C)  0.22
D)  16
E)  5.33F) None of the above
G) A) and B)

Question 11

Phosgene,COCl2,a poisonous gas,decomposes as follows. COCl2(g)  2,a poisonous gas,decomposes as follows. COCl2(g)    CO(g) + Cl2(g) . At 900.ºC,Kc = 0.083.What is KP at this temperature? (R = 0.08206 L • atm/K • mol)  A) 0.125 B) 8.0 C) 6.1 D) 0.16 E) 0.083" class="answers-bank-image d-inline" rel="preload" > CO(g) + Cl2(g) .
At 900.ºC,Kc = 0.083.What is KP at this temperature? (R = 0.08206 L • atm/K • mol)

Accepted Answer

A)  0.125
B)  8.0
C)  6.1
D)  0.16
E)  0.083F) A) and C)
G) A) and D)

Question 12

The reaction system POBr3(g)  3(g)    POBr(g) + Br2(g) is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of bromine is reduced by 75% as equilibrium is established? A) POBr will be consumed as equilibrium is established. B) The partial pressure of POBr will decrease while the partial pressure of Br2 increases as equilibrium is established. C) POBr3 will be consumed as equilibrium is established. D) The volume will have to decrease before equilibrium can be reestablished. E) Bromine will be generated as equilibrium is established." class="answers-bank-image d-inline" rel="preload" > POBr(g) + Br2(g) is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of bromine is reduced by 75% as equilibrium is established?

Accepted Answer

A)  POBr will be consumed as equilibrium is established.
B)  The partial pressure of POBr will decrease while the partial pressure of Br2 increases as equilibrium is established.
C)  POBr3 will be consumed as equilibrium is established.
D)  The volume will have to decrease before equilibrium can be reestablished.
E)  Bromine will be generated as equilibrium is established.F) A) and B)
G) C) and E)

Question 13

For the reaction SO2(g) + NO2(g)  2(g) + NO2(g)    SO3(g) + NO(g) ,the equilibrium constant Kc is 18.0 at 1200ºC.If 1.0 mole of SO2 and 2.0 moles of NO2 are placed in a 20.0-L container,what concentration of SO3 will be present at equilibrium? A) 0.048 mol/L B) 0.11 mol/L C) 0.95 mol/L D) 2.22 mol/L E) 18 mol/L" class="answers-bank-image d-inline" rel="preload" > SO3(g) + NO(g) ,the equilibrium constant Kc is 18.0 at 1200ºC.If 1.0 mole of SO2 and 2.0 moles of NO2 are placed in a 20.0-L container,what concentration of SO3 will be present at equilibrium?

Accepted Answer

A)  0.048 mol/L
B)  0.11 mol/L
C)  0.95 mol/L
D)  2.22 mol/L
E)  18 mol/LF) A) and D)
G) C) and D)

Question 14

Which of the following statements is incorrect regarding equilibrium?

Accepted Answer

A)  Chemical equilibrium is a reversible process with no net change in concentrations of the products and reactants.
B)  Physical equilibrium cannot exist between phases.
C)  A chemical equilibrium with all reactants and products in the same phase is homogeneous.
D)  none of the.E) All of the above
F) A) and D)

Question 15

The equilibrium constant,Kc,for the reaction PCl3(g) + Cl2(g)  c,for the reaction PCl3(g) + Cl2(g)    PCl5(g) is 49 at 230°C. If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230°C,what is the concentration of PCl3 when equilibrium has been established? A) 0.049 M B) 0.11 M C) 0.35 M D) 0.59 M E) 0.83 M" class="answers-bank-image d-inline" rel="preload" > PCl5(g) is 49 at 230°C.
If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230°C,what is the concentration of PCl3 when equilibrium has been established?

Accepted Answer

A)  0.049 M
B)  0.11 M
C)  0.35 M
D)  0.59 M
E)  0.83 MF) C) and D)
G) A) and E)

Question 16

The equilibrium constants (expressed in atm) for the chemical reaction N2(g) + O2(g)  2(g) + O2(g)    2NO(g) are KP = 1.1 × 10-3 and 3.6 × 10-3 at 2200 K and 2500 K,respectively. Which statement is true? A) The reaction is exothermic,ΔHº P is less than Kc by a factor of (RT) . D) The total pressure at 2200 K is the same as at 2500 K. E) Higher total pressure shifts the equilibrium to the left." class="answers-bank-image d-inline" rel="preload" > 2NO(g) are KP = 1.1 × 10-3 and 3.6 × 10-3 at 2200 K and 2500 K,respectively.
Which statement is true?

Accepted Answer

A)  The reaction is exothermic,ΔHº 
B)  The partial pressure of NO(g) is less at 2200 K than at 2500 K.
C)  KP is less than Kc by a factor of (RT) .
D)  The total pressure at 2200 K is the same as at 2500 K.
E)  Higher total pressure shifts the equilibrium to the left.F) B) and E)
G) B) and D)

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

a.State Le Châtelier's principle.
b.The following reaction is at equilibrium in a closed container:
2Fe(OH)3(s)  Fe2O3(s)+ 3H2O(g); ΔH°rxn > 0
What effects,if any,will the following actions have on the position of equilibrium? In each case,
state the direction of any shift in equilibrium,and give your reasons in one sentence.
(i)adding more Fe(OH)3
(ii)raising the temperature
(iii)adding a more water vapor a.If a stress is applied to a system at equilibrium,the equilibrium position shifts so as to reduce that stress.

Accepted Answer

b.(i)No effect.Pure solids and liquids have constant concentration,regardless of total amount.(ii)The equilibrium will move in the endothermic direction,i.e.,more products will form.(iii)The equilibrium will move to the left,i.e.,more reactant will form.

Question 19

What is used to explain the effect of a stress that has been applied to a system at equilibrium?

Accepted Answer

Le Châteli...

Question 20

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s)  4I(s)    NH3(g) + HI(g)  At 400°C,KP = 0.215.Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C. A) 0.103 atm B) 0.215 atm C) 0.232 atm D) 0.464 atm E) 2.00 atm" class="answers-bank-image d-inline" rel="preload" > NH3(g) + HI(g) 
At 400°C,KP = 0.215.Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C.

Accepted Answer

A)  0.103 atm
B)  0.215 atm
C)  0.232 atm
D)  0.464 atm
E)  2.00 atmF) A) and E)
G) None of the above

Exam 15: Chemical Equilibrium

Which is the correct equilibrium constant expression for the following reaction? 2C₆H₆(g) + 15O₂(g) 12CO₂(g) + 6H₂O(g)

Correct Answer
verified

At 400ºC,K_c = 64 for the equilibrium H₂(g) + I₂(g) 2HI(g) .If 3.00 mol H₂ and 3.00 mol I₂ are introduced into an empty 4.0-L vessel,what is the equilibrium concentration of HI at 400ºC?

Correct Answer
verified

Which statement is correct?

Correct Answer
verified

When the substances in the equation below are at equilibrium,at pressure,P,and temperature, T,the equilibrium can be shifted to favor the products by CuO(s) + H₂(g) H₂O(g) + Cu(s) ΔHº_rxn = -2.0 kJ/mol

Correct Answer
verified
C

If one starts with pure NO₂(g) at a pressure of 0.500 atm,the total pressure inside the reaction vessel when 2NO₂(g) 2NO(g) + O₂(g) reaches equilibrium is 0.674 atm. What is the equilibrium partial pressure of NO₂?

Correct Answer
verified

Consider the equilibrium equation C(s)+ O₂(g)

Correct Answer
verified
CO₂(g),where ΔH_rxn = -393.5 kJ/mo...
View Answer

What is the expression for K_P for the following reaction? A(g) B(g) + 2C(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_c for this reaction?

Correct Answer
verified
E

Suppose 15.00 g of solid ammonium hydrogen sulfide is introduced into a 500.-mL flask at 25°C,the flask is sealed,and the system is allowed to reach equilibrium.What is the partial pressure of ammonia in this flask if K_P = 0.108 at 25°C for the following reaction? NH₄HS(s) NH₃(g) + H₂S(g)

Correct Answer
verified

For the endothermic reaction A₂(g) 2A(g) ,a snapshot of an equilibrium mixture of A(g) and A₂(g) may look as follows.(Each circle represents 1.0 mol of A atoms,and the volume of the box is 1.0 L.) What is the equilibrium constant K_P for this reaction at 298 K? (R = 0.08206 L • atm/K • mol)

Correct Answer
verified

Phosgene,COCl₂,a poisonous gas,decomposes as follows. COCl₂(g) CO(g) + Cl₂(g) . At 900.ºC,K_c = 0.083.What is KP at this temperature? (R = 0.08206 L • atm/K • mol)

Correct Answer
verified

The reaction system POBr₃(g) POBr(g) + Br₂(g) is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of bromine is reduced by 75% as equilibrium is established?

Correct Answer
verified

For the reaction SO₂(g) + NO₂(g) SO₃(g) + NO(g) ,the equilibrium constant K_c is 18.0 at 1200ºC.If 1.0 mole of SO₂ and 2.0 moles of NO₂ are placed in a 20.0-L container,what concentration of SO₃ will be present at equilibrium?

Correct Answer
verified

Which of the following statements is incorrect regarding equilibrium?

Correct Answer
verified

The equilibrium constant,K_c,for the reaction PCl₃(g) + Cl₂(g) PCl₅(g) is 49 at 230°C. If 0.70 mol of PCl₃ is added to 0.70 mol of Cl₂ in a 1.00-L reaction vessel at 230°C,what is the concentration of PCl₃ when equilibrium has been established?

Correct Answer
verified

The equilibrium constants (expressed in atm) for the chemical reaction N₂(g) + O₂(g) 2NO(g) are K_P = 1.1 × 10^-3 and 3.6 × 10^-3 at 2200 K and 2500 K,respectively. Which statement is true?

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified
b.(i)No effect.Pure solids and liquids have constant concentration,regardless of total amount.(ii)The equilibrium will move in the endothermic direction,i.e.,more products will form.(iii)The equilibrium will move to the left,i.e.,more reactant will form.

What is used to explain the effect of a stress that has been applied to a system at equilibrium?

Correct Answer
verified
Le Châteli...
View Answer

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH₄I(s) NH₃(g) + HI(g) At 400°C,K_P = 0.215.Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C.

Correct Answer
verified

Exam 15: Chemical Equilibrium

Which is the correct equilibrium constant expression for the following reaction? 2C6H6(g) + 15O2(g) 12CO2(g) + 6H2O(g)

Correct AnswerverifiedShow Answer

At 400ºC,Kc = 64 for the equilibrium H2(g) + I2(g) 2HI(g) .If 3.00 mol H2 and 3.00 mol I2 are introduced into an empty 4.0-L vessel,what is the equilibrium concentration of HI at 400ºC?

Correct AnswerverifiedShow Answer

Which statement is correct?

Correct AnswerverifiedShow Answer

When the substances in the equation below are at equilibrium,at pressure,P,and temperature, T,the equilibrium can be shifted to favor the products by CuO(s) + H2(g) H2O(g) + Cu(s) ΔHºrxn = -2.0 kJ/mol

Correct AnswerverifiedC

If one starts with pure NO2(g) at a pressure of 0.500 atm,the total pressure inside the reaction vessel when 2NO2(g) 2NO(g) + O2(g) reaches equilibrium is 0.674 atm. What is the equilibrium partial pressure of NO2?

Correct AnswerverifiedShow Answer

Consider the equilibrium equation C(s)+ O2(g)

Correct Answerverified CO2(g),where ΔHrxn = -393.5 kJ/mo...View AnswerShow Answer

What is the expression for KP for the following reaction? A(g) B(g) + 2C(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 Kc for this reaction?

Correct AnswerverifiedE

Suppose 15.00 g of solid ammonium hydrogen sulfide is introduced into a 500.-mL flask at 25°C,the flask is sealed,and the system is allowed to reach equilibrium.What is the partial pressure of ammonia in this flask if KP = 0.108 at 25°C for the following reaction? NH4HS(s) NH3(g) + H2S(g)

Correct AnswerverifiedShow Answer

For the endothermic reaction A2(g) 2A(g) ,a snapshot of an equilibrium mixture of A(g) and A2(g) may look as follows.(Each circle represents 1.0 mol of A atoms,and the volume of the box is 1.0 L.) What is the equilibrium constant KP for this reaction at 298 K? (R = 0.08206 L • atm/K • mol)

Correct AnswerverifiedShow Answer

Phosgene,COCl2,a poisonous gas,decomposes as follows. COCl2(g) CO(g) + Cl2(g) . At 900.ºC,Kc = 0.083.What is KP at this temperature? (R = 0.08206 L • atm/K • mol)

Correct AnswerverifiedShow Answer

The reaction system POBr3(g) POBr(g) + Br2(g) is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of bromine is reduced by 75% as equilibrium is established?

Correct AnswerverifiedShow Answer

For the reaction SO2(g) + NO2(g) SO3(g) + NO(g) ,the equilibrium constant Kc is 18.0 at 1200ºC.If 1.0 mole of SO2 and 2.0 moles of NO2 are placed in a 20.0-L container,what concentration of SO3 will be present at equilibrium?

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect regarding equilibrium?

Correct AnswerverifiedShow Answer

The equilibrium constant,Kc,for the reaction PCl3(g) + Cl2(g) PCl5(g) is 49 at 230°C. If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230°C,what is the concentration of PCl3 when equilibrium has been established?

Correct AnswerverifiedShow Answer

The equilibrium constants (expressed in atm) for the chemical reaction N2(g) + O2(g) 2NO(g) are KP = 1.1 × 10-3 and 3.6 × 10-3 at 2200 K and 2500 K,respectively. Which statement is true?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answerverifiedb.(i)No effect.Pure solids and liquids have constant concentration,regardless of total amount.(ii)The equilibrium will move in the endothermic direction,i.e.,more products will form.(iii)The equilibrium will move to the left,i.e.,more reactant will form.

What is used to explain the effect of a stress that has been applied to a system at equilibrium?

Correct AnswerverifiedLe Châteli...View AnswerShow Answer

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s) NH3(g) + HI(g) At 400°C,KP = 0.215.Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C.

Correct AnswerverifiedShow Answer

Which is the correct equilibrium constant expression for the following reaction? 2C₆H₆(g) + 15O₂(g) 12CO₂(g) + 6H₂O(g)

Correct Answer
verified

At 400ºC,K_c = 64 for the equilibrium H₂(g) + I₂(g) 2HI(g) .If 3.00 mol H₂ and 3.00 mol I₂ are introduced into an empty 4.0-L vessel,what is the equilibrium concentration of HI at 400ºC?

Correct Answer
verified

Correct Answer
verified

When the substances in the equation below are at equilibrium,at pressure,P,and temperature, T,the equilibrium can be shifted to favor the products by CuO(s) + H₂(g) H₂O(g) + Cu(s) ΔHº_rxn = -2.0 kJ/mol

Correct Answer
verified
C

If one starts with pure NO₂(g) at a pressure of 0.500 atm,the total pressure inside the reaction vessel when 2NO₂(g) 2NO(g) + O₂(g) reaches equilibrium is 0.674 atm. What is the equilibrium partial pressure of NO₂?

Correct Answer
verified

Consider the equilibrium equation C(s)+ O₂(g)

Correct Answer
verified
CO₂(g),where ΔH_rxn = -393.5 kJ/mo...
View Answer

What is the expression for K_P for the following reaction? A(g) B(g) + 2C(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_c for this reaction?

Correct Answer
verified
E

Suppose 15.00 g of solid ammonium hydrogen sulfide is introduced into a 500.-mL flask at 25°C,the flask is sealed,and the system is allowed to reach equilibrium.What is the partial pressure of ammonia in this flask if K_P = 0.108 at 25°C for the following reaction? NH₄HS(s) NH₃(g) + H₂S(g)

Correct Answer
verified

For the endothermic reaction A₂(g) 2A(g) ,a snapshot of an equilibrium mixture of A(g) and A₂(g) may look as follows.(Each circle represents 1.0 mol of A atoms,and the volume of the box is 1.0 L.) What is the equilibrium constant K_P for this reaction at 298 K? (R = 0.08206 L • atm/K • mol)

Correct Answer
verified

Phosgene,COCl₂,a poisonous gas,decomposes as follows. COCl₂(g) CO(g) + Cl₂(g) . At 900.ºC,K_c = 0.083.What is KP at this temperature? (R = 0.08206 L • atm/K • mol)

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The reaction system POBr₃(g) POBr(g) + Br₂(g) is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of bromine is reduced by 75% as equilibrium is established?

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For the reaction SO₂(g) + NO₂(g) SO₃(g) + NO(g) ,the equilibrium constant K_c is 18.0 at 1200ºC.If 1.0 mole of SO₂ and 2.0 moles of NO₂ are placed in a 20.0-L container,what concentration of SO₃ will be present at equilibrium?

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The equilibrium constant,K_c,for the reaction PCl₃(g) + Cl₂(g) PCl₅(g) is 49 at 230°C. If 0.70 mol of PCl₃ is added to 0.70 mol of Cl₂ in a 1.00-L reaction vessel at 230°C,what is the concentration of PCl₃ when equilibrium has been established?

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The equilibrium constants (expressed in atm) for the chemical reaction N₂(g) + O₂(g) 2NO(g) are K_P = 1.1 × 10^-3 and 3.6 × 10^-3 at 2200 K and 2500 K,respectively. Which statement is true?

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b.(i)No effect.Pure solids and liquids have constant concentration,regardless of total amount.(ii)The equilibrium will move in the endothermic direction,i.e.,more products will form.(iii)The equilibrium will move to the left,i.e.,more reactant will form.

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Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH₄I(s) NH₃(g) + HI(g) At 400°C,K_P = 0.215.Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C.

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