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)

A) 0.125 B) 8.0 C) 6.1 D) 0.16 E) 0.083 A) 0.125 B) 8.0 C) 6.1 D) 0.16 E) 0.083

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?

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

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

@#IMG-DLM& CO 2 (g),where ΔH rxn = -393.5 kJ/mo

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?

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

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?

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. 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.

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?

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

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?

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

Exam 15: Chemical Equilibrium

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

Free

(Multiple Choice)

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Question 1

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?

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(Multiple Choice)

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Question 2

Correct Answer:

Verified

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.

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Question 3

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.

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)

(Multiple Choice)

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Question 4

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

(Multiple Choice)

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Question 5

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?

(Multiple Choice)

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Question 6

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

(Essay)

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Question 7

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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Question 8

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

(True/False)

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Question 9

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?

(Multiple Choice)

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Question 10

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

(Short Answer)

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Question 11

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

(Multiple Choice)

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Question 12

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?

(Multiple Choice)

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Question 13

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?

(Multiple Choice)

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Question 14

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?

(Multiple Choice)

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Question 15

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)

(Multiple Choice)

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Question 16

Which statement is correct?

(Multiple Choice)

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Question 17

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)

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Question 18

Which of the following statements is incorrect regarding equilibrium?

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Question 19

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?

(Multiple Choice)

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Question 20

Showing 1 - 20 of 135

Exam 15: Chemical Equilibrium

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

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?

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)

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

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?

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

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.

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

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?

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

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

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?

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?

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?

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)

Which statement is correct?

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)

Which of the following statements is incorrect regarding equilibrium?

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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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

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?

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)

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

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?

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

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.

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?

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

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?

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?

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?

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)

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)

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?