Carbon tetrachloride reacts at high temperatures with oxygen to produce two toxic gases, phosgene and chlorine. CCl4(g)+ ½O2(g) COCl2(g)+ Cl2(g),Kc = 4.4 × 109 at 1000 K What is Kc for the following reaction? 2CCl4(g)+ O2(g) 2COCl2(g)+ 2Cl2(g)

A) 6.6 × 104 B) 4.4 × 109 C) 8.8 × 109 D) 1.9 × 1019 E) 2.3 × 10-10 A) 6.6 × 104 B) 4.4 × 109 C) 8.8 × 109 D) 1.9 × 1019 E) 2.3 × 10-10

Consider the following equilibria: 2SO3(g) 2SO2(g)+ O2(g)Kc = 2.3 × 10-7 2NO3(g) 2NO2(g)+ O2(g)Kc = 1.4 × 10-3 Calculate the equilibrium constant for the reaction SO2(g)+ NO3(g) SO3(g)+ NO2(g).

A) 78 B) 1.3 × 10-2 C) 1.6 × 10-4 D) 3.2 × 10-10 E) 6.1 × 103 A) 78 B) 1.3 × 10-2 C) 1.6 × 10-4 D) 3.2 × 10-10 E) 6.1 × 103

The reaction of nitrogen with oxygen to form nitrogen monoxide can be represented by the following equation. N2(g)+ O2(g) 2NO(g) At 2000.°C,the equilibrium constant,Kc,has a value of 4.10 × 10-4.What is the value of KP? (R = 0.08206 L • atm/K • mol)

A) 2.17 × 10-8 B) 4.10 × 10-4 C) 7.65 × 10-2 D) 2.20 ×10-6 E) 2.44 ×103 A) 2.17 × 10-8 B) 4.10 × 10-4 C) 7.65 × 10-2 D) 2.20 ×10-6 E) 2.44 ×103

Calculate KP for the reaction 2NOCl(g) 2NO(g)+ Cl2(g)at 400.°C if Kc at 400.°C for this reaction is 2.1 × 10-2.(R = 0.08206 L • atm/K • mol)

A) 6.4 × 10-3 B) 1.7 × 10-3 C) 0.69 D) 1.2 E) 3.8 × 10-4 A) 6.4 × 10-3 B) 1.7 × 10-3 C) 0.69 D) 1.2 E) 3.8 × 10-4

The following reaction is at equilibrium in a sealed container. N2(g)+ 3H2(g) 2NH3(g); ΔH°rxn c?

A) Adding more NH3 B) Adding more N2 C) Increasing the pressure D) Lowering the temperature E) Adding a catalyst A) Adding more NH3 B) Adding more N2 C) Increasing the pressure D) Lowering the temperature E) Adding a catalyst

A) If ΔG K. B) If ΔG o o K. A) If ΔG K. B) If ΔG o o K.

Hydrogen peroxide may decompose to form water and oxygen gas according to the following reaction. 2H2O2(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 Kc 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 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

The equilibrium constant for the reaction Ni(s)+ 4CO(g) Ni(CO)4(g)is 5.0× 104 at 25ºC. What is the equilibrium constant for the following reaction? Ni(CO)4(g) Ni(s)+ 4CO(g)?

A) 2.0 × 10-5 B) 2.5 × 109 C) 5.0 × 104 D) 5.0 × 10-4 E) 2.0 × 10-3 A) 2.0 × 10-5 B) 2.5 × 109 C) 5.0 × 104 D) 5.0 × 10-4 E) 2.0 × 10-3

The reaction 2H2O2(g) 2H2O(g)+ O2(g)is exothermic,ΔHºrxn = -210 kJ/mol.Which one of the following is correct?

A) KP at 800 K is smaller than KP at 1200 K. B) Temperature does not affect KP C) KP depends only on the pressure. D) KP at 1200 K is smaller than KP at 800 K. E) KP depends on total pressure as well as temperature. A) KP at 800 K is smaller than KP at 1200 K. B) Temperature does not affect KP C) KP depends only on the pressure. D) KP at 1200 K is smaller than KP at 800 K. E) KP depends on total pressure as well as temperature.

For the following reaction at 25ºC,is 3 × 1024. 2SO2(g)+ O2(g) 2SO3(g) What is Kc at this temperature? (R = 0.08206 L • atm/K • mol)

A) 1 × 1023 B) 1 × 1024 C) 3 × 1024 D) 6 × 1024 E) 7 × 1025 A) 1 × 1023 B) 1 × 1024 C) 3 × 1024 D) 6 × 1024 E) 7 × 1025

Exam 15: Chemical Equilibrium

Carbon tetrachloride reacts at high temperatures with oxygen to produce two toxic gases, phosgene and chlorine. CCl₄(g)+ ½O₂(g) COCl₂(g)+ Cl₂(g),K_c = 4.4 × 10⁹ at 1000 K What is K_c for the following reaction? 2CCl₄(g)+ O₂(g) 2COCl₂(g)+ 2Cl₂(g)

(Multiple Choice)

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Question 21

Consider the following equilibria: 2SO₃(g) 2SO₂(g)+ O₂(g)K_c = 2.3 × 10^-7 2NO₃(g) 2NO₂(g)+ O₂(g)K_c = 1.4 × 10^-3 Calculate the equilibrium constant for the reaction SO₂(g)+ NO₃(g) SO₃(g)+ NO₂(g).

(Multiple Choice)

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Question 22

For the common allotropes of carbon (graphite and diamond),C(gr) C(dia)with equilibrium constant K = 0.32.The molar volumes of graphite and diamond are,respectively, 5.30 cm³/mol and 3.42 cm³/mol; ΔHf of diamond is 1.90 kJ/mol.These data suggest that the formation of diamond is favored at

(Multiple Choice)

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Question 23

A(n)________________ means that the products of the reaction can react to form reactants.

(Short Answer)

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Question 24

The reaction of nitrogen with oxygen to form nitrogen monoxide can be represented by the following equation. N₂(g)+ O₂(g) 2NO(g) At 2000.°C,the equilibrium constant,K_c,has a value of 4.10 × 10^-4.What is the value of K_P? (R = 0.08206 L • atm/K • mol)

(Multiple Choice)

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Question 25

Calculate K_P for the reaction 2NOCl(g) 2NO(g)+ Cl₂(g)at 400.°C if K_c at 400.°C for this reaction is 2.1 × 10^-2.(R = 0.08206 L • atm/K • mol)

(Multiple Choice)

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Question 26

The following reaction is at equilibrium in a sealed container. N₂(g)+ 3H₂(g) 2NH₃(g); ΔH°_rxn < 0 Which,if any,of the following actions will increase the value of the equilibrium constant,K_c?

(Multiple Choice)

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Question 27

Which is correct?

(Multiple Choice)

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Question 28

For the following reaction at equilibrium in a reaction vessel,which one of these changes would cause the I₂ concentration to increase? 2NOI(g) 2NO(g)+ I₂(g),ΔHº_rxn = 45.3 kJ/mol

(Multiple Choice)

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Question 29

Hydrogen peroxide may decompose to form water and oxygen gas according to the following reaction. 2H₂O₂(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_c for the reaction?

(Multiple Choice)

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Question 30

The equilibrium constant for the reaction Ni(s)+ 4CO(g) Ni(CO)₄(g)is 5.0× 10⁴ at 25ºC. What is the equilibrium constant for the following reaction? Ni(CO)₄(g) Ni(s)+ 4CO(g)?

(Multiple Choice)

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Question 31

During a chemical reaction,what defines when the concentrations of the reactants and products reach a constant level?

(Multiple Choice)

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Question 32

What is the name for Q_c?

(Multiple Choice)

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Question 33

The reaction 2H₂O₂(g) 2H₂O(g)+ O₂(g)is exothermic,ΔHº_rxn = -210 kJ/mol.Which one of the following is correct?

(Multiple Choice)

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Question 34

Which is the correct mass-action expression,Qc,for the following chemical reaction? Sn²⁺(aq)+ ½ O₂(g)+ 3H₂O(l) SnO₂(s)+ 2H₃O⁺(aq)

(Multiple Choice)

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Question 35

For the following reaction at 25ºC,is 3 × 10²⁴. 2SO₂(g)+ O₂(g) 2SO₃(g) What is K_c at this temperature? (R = 0.08206 L • atm/K • mol)

(Multiple Choice)

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Question 36

Consider this reaction at equilibrium: 2H₂O₂(g) 2H₂O(g)+ O₂(g),ΔHº_rxn = -210 kJ/mol If the volume of the system is expanded at constant temperature,what change will occur in the position of the equilibrium?

(Multiple Choice)

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Question 37

Consider the equilibrium: A(s) B(s)+ C(g); ΔH°_rxn > 0 Predict and explain how or whether the following actions would affect this equilibrium. a.adding more solid A b.lowering the temperature c.increasing the pressure on the system by reducing its volume d.adding helium gas to increase the total pressure a.No effect.Pure solids and liquids have constant concentration,regardless of total amount.

(Essay)

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Question 38

For the reaction 2NOCl(g) 2NO(g)+ Cl₂(g),K_c = 8.0 at a certain temperature.What concentration of NOCl must be put into an empty 4.00 - reaction vessel in order that the equilibrium concentration of NOCl is 1.00 M?

(Multiple Choice)

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Question 39

Which equation is correct?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 135

Exam 15: Chemical Equilibrium

Carbon tetrachloride reacts at high temperatures with oxygen to produce two toxic gases, phosgene and chlorine. CCl4(g)+ ½O2(g) COCl2(g)+ Cl2(g),Kc = 4.4 × 109 at 1000 K What is Kc for the following reaction? 2CCl4(g)+ O2(g) 2COCl2(g)+ 2Cl2(g)

Consider the following equilibria: 2SO3(g) 2SO2(g)+ O2(g)Kc = 2.3 × 10-7 2NO3(g) 2NO2(g)+ O2(g)Kc = 1.4 × 10-3 Calculate the equilibrium constant for the reaction SO2(g)+ NO3(g) SO3(g)+ NO2(g).

For the common allotropes of carbon (graphite and diamond),C(gr) C(dia)with equilibrium constant K = 0.32.The molar volumes of graphite and diamond are,respectively, 5.30 cm3/mol and 3.42 cm3/mol; ΔHf of diamond is 1.90 kJ/mol.These data suggest that the formation of diamond is favored at

A(n)________________ means that the products of the reaction can react to form reactants.

The reaction of nitrogen with oxygen to form nitrogen monoxide can be represented by the following equation. N2(g)+ O2(g) 2NO(g) At 2000.°C,the equilibrium constant,Kc,has a value of 4.10 × 10-4.What is the value of KP? (R = 0.08206 L • atm/K • mol)

Calculate KP for the reaction 2NOCl(g) 2NO(g)+ Cl2(g)at 400.°C if Kc at 400.°C for this reaction is 2.1 × 10-2.(R = 0.08206 L • atm/K • mol)

The following reaction is at equilibrium in a sealed container. N2(g)+ 3H2(g) 2NH3(g); ΔH°rxn < 0 Which,if any,of the following actions will increase the value of the equilibrium constant,Kc?

Which is correct?

For the following reaction at equilibrium in a reaction vessel,which one of these changes would cause the I2 concentration to increase? 2NOI(g) 2NO(g)+ I2(g),ΔHºrxn = 45.3 kJ/mol

The equilibrium constant for the reaction Ni(s)+ 4CO(g) Ni(CO)4(g)is 5.0× 104 at 25ºC. What is the equilibrium constant for the following reaction? Ni(CO)4(g) Ni(s)+ 4CO(g)?

During a chemical reaction,what defines when the concentrations of the reactants and products reach a constant level?

What is the name for Qc?

The reaction 2H2O2(g) 2H2O(g)+ O2(g)is exothermic,ΔHºrxn = -210 kJ/mol.Which one of the following is correct?

Which is the correct mass-action expression,Qc,for the following chemical reaction? Sn2+(aq)+ ½ O2(g)+ 3H2O(l) SnO2(s)+ 2H3O+(aq)

For the following reaction at 25ºC,is 3 × 1024. 2SO2(g)+ O2(g) 2SO3(g) What is Kc at this temperature? (R = 0.08206 L • atm/K • mol)

Consider this reaction at equilibrium: 2H2O2(g) 2H2O(g)+ O2(g),ΔHºrxn = -210 kJ/mol If the volume of the system is expanded at constant temperature,what change will occur in the position of the equilibrium?

For the reaction 2NOCl(g) 2NO(g)+ Cl2(g),Kc = 8.0 at a certain temperature.What concentration of NOCl must be put into an empty 4.00 - reaction vessel in order that the equilibrium concentration of NOCl is 1.00 M?

Which equation is correct?

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Carbon tetrachloride reacts at high temperatures with oxygen to produce two toxic gases, phosgene and chlorine. CCl₄(g)+ ½O₂(g) COCl₂(g)+ Cl₂(g),K_c = 4.4 × 10⁹ at 1000 K What is K_c for the following reaction? 2CCl₄(g)+ O₂(g) 2COCl₂(g)+ 2Cl₂(g)

Consider the following equilibria: 2SO₃(g) 2SO₂(g)+ O₂(g)K_c = 2.3 × 10^-7 2NO₃(g) 2NO₂(g)+ O₂(g)K_c = 1.4 × 10^-3 Calculate the equilibrium constant for the reaction SO₂(g)+ NO₃(g) SO₃(g)+ NO₂(g).

For the common allotropes of carbon (graphite and diamond),C(gr) C(dia)with equilibrium constant K = 0.32.The molar volumes of graphite and diamond are,respectively, 5.30 cm³/mol and 3.42 cm³/mol; ΔHf of diamond is 1.90 kJ/mol.These data suggest that the formation of diamond is favored at

The reaction of nitrogen with oxygen to form nitrogen monoxide can be represented by the following equation. N₂(g)+ O₂(g) 2NO(g) At 2000.°C,the equilibrium constant,K_c,has a value of 4.10 × 10^-4.What is the value of K_P? (R = 0.08206 L • atm/K • mol)

Calculate K_P for the reaction 2NOCl(g) 2NO(g)+ Cl₂(g)at 400.°C if K_c at 400.°C for this reaction is 2.1 × 10^-2.(R = 0.08206 L • atm/K • mol)

The following reaction is at equilibrium in a sealed container. N₂(g)+ 3H₂(g) 2NH₃(g); ΔH°_rxn < 0 Which,if any,of the following actions will increase the value of the equilibrium constant,K_c?

For the following reaction at equilibrium in a reaction vessel,which one of these changes would cause the I₂ concentration to increase? 2NOI(g) 2NO(g)+ I₂(g),ΔHº_rxn = 45.3 kJ/mol

The equilibrium constant for the reaction Ni(s)+ 4CO(g) Ni(CO)₄(g)is 5.0× 10⁴ at 25ºC. What is the equilibrium constant for the following reaction? Ni(CO)₄(g) Ni(s)+ 4CO(g)?

What is the name for Q_c?

The reaction 2H₂O₂(g) 2H₂O(g)+ O₂(g)is exothermic,ΔHº_rxn = -210 kJ/mol.Which one of the following is correct?

Which is the correct mass-action expression,Qc,for the following chemical reaction? Sn²⁺(aq)+ ½ O₂(g)+ 3H₂O(l) SnO₂(s)+ 2H₃O⁺(aq)

For the following reaction at 25ºC,is 3 × 10²⁴. 2SO₂(g)+ O₂(g) 2SO₃(g) What is K_c at this temperature? (R = 0.08206 L • atm/K • mol)

Consider this reaction at equilibrium: 2H₂O₂(g) 2H₂O(g)+ O₂(g),ΔHº_rxn = -210 kJ/mol If the volume of the system is expanded at constant temperature,what change will occur in the position of the equilibrium?

For the reaction 2NOCl(g) 2NO(g)+ Cl₂(g),K_c = 8.0 at a certain temperature.What concentration of NOCl must be put into an empty 4.00 - reaction vessel in order that the equilibrium concentration of NOCl is 1.00 M?