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

A) adding a catalyst B) adding more N2 C) increasing the pressure D) lowering the temperature E) None of these choices are correct. A) adding a catalyst B) adding more N2 C) increasing the pressure D) lowering the temperature E) None of these choices are correct.

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?

A) 2.17 × 10-8 B) 4.10 × 10-4 C) 7.65 × 10-2 D) 7.75 E) None of these choices are correct. A) 2.17 × 10-8 B) 4.10 × 10-4 C) 7.65 × 10-2 D) 7.75 E) None of these choices are correct.

Hydrogen sulfide will react with water as shown in the following reactions. H2S(g) + H2O(l) H3O+(aq) + HS-(aq) K1 = 1.0 × 10-7 HS-(aq) + H2O(l) H3O+(aq) + S2-(aq) K2 = ? H2S(g) + 2H2O(l) 2H3O+(aq) + S2-(aq) K3 = 1.3 × 10-20 What is the value of K2?

A) 1.3 × 10-27 B) 2.3 × 10-7 C) 1.3 × 10-13 D) 7.7 × 1012 E) 7.7 × 1026 A) 1.3 × 10-27 B) 2.3 × 10-7 C) 1.3 × 10-13 D) 7.7 × 1012 E) 7.7 × 1026

Magnesium carbonate dissociates to magnesium oxide and carbon dioxide at elevated temperatures. MgCO3(s) MgO(s) + CO2(g) A reaction vessel contains these compounds in equilibrium at 300°C. What will happen if the volume of the container is reduced by 25% at 300°C?

A) The partial pressure of carbon dioxide present at equilibrium will increase. B) The partial pressure of carbon dioxide present at equilibrium will decrease. C) The partial pressure of carbon dioxide at equilibrium will be unchanged. D) The equilibrium constant will have to decrease to compensate for the decrease in volume. E) More information is needed in order to make a valid judgment. A) The partial pressure of carbon dioxide present at equilibrium will increase. B) The partial pressure of carbon dioxide present at equilibrium will decrease. C) The partial pressure of carbon dioxide at equilibrium will be unchanged. D) The equilibrium constant will have to decrease to compensate for the decrease in volume. E) More information is needed in order to make a valid judgment.

Consider the reactions of cadmium with the thiosulfate anion. Cd2+(aq) + S2O32-(aq) Cd(S2O3)(aq) K1 = 8.3 × 103 Cd(S2O3)(aq) + S2O32-(aq) Cd(S2O3)22-(aq) K2 = 2.5 × 102 What is the value for the equilibrium constant for the following reaction? Cd2+(aq) + 2S2O32-(aq) Cd(S2O3)22-(aq)

A) 0.030 B) 33 C) 8.1 × 103 D) 8.6 × 103 E) 2.1 × 106 A) 0.030 B) 33 C) 8.1 × 103 D) 8.6 × 103 E) 2.1 × 106

Nitrogen dioxide decomposes according to the reaction 2NO2(g) 2NO(g) + O2(g) Where Kp = 4.48 × 10-13 at 25°C. What is the value for Kc?

A) 1.81 × 10-16 B) 1.83 × 10-14 C) 4.48 × 10-13 D) 1.10 × 10-11 E) 1.11 × 10-9 A) 1.81 × 10-16 B) 1.83 × 10-14 C) 4.48 × 10-13 D) 1.10 × 10-11 E) 1.11 × 10-9

Exam 17: Equilibrium the Extent of Chemical Reactions

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 21

For a solution equilibrium, a change in concentration of a reactant or product does not change K_c.

(True/False)

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Question 22

The following reaction is at equilibrium at a pressure of 1 atm, in a closed container. NaOH(s) + CO₂(g) NaHCO₃(s) ΔH°_rxn < 0 Which, if any, of the following actions will decrease the concentration of CO₂ gas present at equilibrium?

(Multiple Choice)

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Question 23

For a gas-phase equilibrium, a change in the pressure of any single reactant or product will affect the amounts of other substances involved in the equilibrium.

(True/False)

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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?

(Multiple Choice)

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Question 25

An equilibrium is established in which both the forward (fwd) and the reverse (rev) reactions are elementary. If the equilibrium constant K_c = 1.6 × 10^-2 and the rate constant k_fwd = 8.0 × 10^-7 s^-1 what is the value of k_rev?

(Multiple Choice)

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Question 26

In order to write the correct mass-action expression for a reaction one must

(Multiple Choice)

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Question 27

Hydrogen sulfide will react with water as shown in the following reactions. H₂S(g) + H₂O(l) H₃O⁺(aq) + HS^-(aq) K₁ = 1.0 × 10^-7 HS^-(aq) + H₂O(l) H₃O⁺(aq) + S^2-(aq) K₂ = ? H₂S(g) + 2H₂O(l) 2H₃O⁺(aq) + S^2-(aq) K₃ = 1.3 × 10^-20 What is the value of K₂?

(Multiple Choice)

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Question 28

A container was charged with hydrogen, nitrogen, and ammonia gases at 120°C and the system was allowed to reach equilibrium. What will happen if the volume of the container is increased at constant temperature? 3H₂(g) + N₂(g) 2NH₃(g)

(Multiple Choice)

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Question 29

At 25°C, the equilibrium constant K_c for the reaction 2A(g) B(g) + C(g) Is 0.035. A mixture of 8.00 moles of B and 12.00 moles of C in a 20.0 L container is allowed to come to equilibrium. What is the equilibrium concentration of A?

(Multiple Choice)

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Question 30

Write the mass-action expression, c, for the following chemical reaction. 2Cu₂₊(aq) + 4I^-(aq) 2CuI(s) + I₂(aq)

(Multiple Choice)

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Question 31

Magnesium carbonate dissociates to magnesium oxide and carbon dioxide at elevated temperatures. MgCO₃(s) MgO(s) + CO₂(g) A reaction vessel contains these compounds in equilibrium at 300°C. What will happen if the volume of the container is reduced by 25% at 300°C?

(Multiple Choice)

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Question 32

The reaction system POCl₃(g) POCl(g) + Cl₂(g) Is at equilibrium. Which of the following statements describes the behavior of the system if POCl is added to the container?

(Multiple Choice)

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Question 33

Write the mass-action expression, c, for the following chemical reaction. Sn²⁺(aq) + ½O₂(g) + 3H₂O(l) SnO₂(s) + 2H₃O⁺(aq)

(Multiple Choice)

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Question 34

Consider the reactions of cadmium with the thiosulfate anion. Cd²⁺(aq) + S₂O₃^2-(aq) Cd(S₂O₃)(aq) K₁ = 8.3 × 10³ Cd(S₂O₃)(aq) + S₂O₃^2-(aq) Cd(S₂O₃)₂^2-(aq) K₂ = 2.5 × 10² What is the value for the equilibrium constant for the following reaction? Cd²⁺(aq) + 2S₂O₃^2-(aq) Cd(S₂O₃)₂^2-(aq)

(Multiple Choice)

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Question 35

The equilibrium constant, Kp, for the reaction H₂(g) + I₂(g) 2HI(g) Is 55.2 at 425°C. A rigid cylinder at that temperature contains 0.127 atm of hydrogen, 0.134 atm of iodine, and 1.055 atm of hydrogen iodide. Is the system at equilibrium?

(Multiple Choice)

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Question 36

When a chemical system is at equilibrium,

(Multiple Choice)

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Question 37

The reaction system CS₂(g) + 4H₂(g) CH₄(g) + 2H₂S(g) Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of carbon disulfide is reduced?

(Multiple Choice)

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Question 38

At 25°C, the equilibrium constant Kc for the reaction 2A(aq) B(aq) + C(aq) Is 65. If 2.50 mol of A is added to enough water to prepare 1.00 L of solution, what will the equilibrium concentration of A be?

(Multiple Choice)

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Question 39

Nitrogen dioxide decomposes according to the reaction 2NO₂(g) 2NO(g) + O₂(g) Where K_p = 4.48 × 10^-13 at 25°C. What is the value for K_c?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 97

Exam 17: Equilibrium the Extent of Chemical Reactions

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?

For a solution equilibrium, a change in concentration of a reactant or product does not change Kc.

The following reaction is at equilibrium at a pressure of 1 atm, in a closed container. NaOH(s) + CO2(g) NaHCO3(s) ΔH°rxn < 0 Which, if any, of the following actions will decrease the concentration of CO2 gas present at equilibrium?

For a gas-phase equilibrium, a change in the pressure of any single reactant or product will affect the amounts of other substances involved in the equilibrium.

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?

An equilibrium is established in which both the forward (fwd) and the reverse (rev) reactions are elementary. If the equilibrium constant Kc = 1.6 × 10-2 and the rate constant kfwd = 8.0 × 10-7 s-1 what is the value of krev?

In order to write the correct mass-action expression for a reaction one must

Hydrogen sulfide will react with water as shown in the following reactions. H2S(g) + H2O(l) H3O+(aq) + HS-(aq) K1 = 1.0 × 10-7 HS-(aq) + H2O(l) H3O+(aq) + S2-(aq) K2 = ? H2S(g) + 2H2O(l) 2H3O+(aq) + S2-(aq) K3 = 1.3 × 10-20 What is the value of K2?

A container was charged with hydrogen, nitrogen, and ammonia gases at 120°C and the system was allowed to reach equilibrium. What will happen if the volume of the container is increased at constant temperature? 3H2(g) + N2(g) 2NH3(g)

At 25°C, the equilibrium constant Kc for the reaction 2A(g) B(g) + C(g) Is 0.035. A mixture of 8.00 moles of B and 12.00 moles of C in a 20.0 L container is allowed to come to equilibrium. What is the equilibrium concentration of A?

Write the mass-action expression, c, for the following chemical reaction. 2Cu2+(aq) + 4I-(aq) 2CuI(s) + I2(aq)

Magnesium carbonate dissociates to magnesium oxide and carbon dioxide at elevated temperatures. MgCO3(s) MgO(s) + CO2(g) A reaction vessel contains these compounds in equilibrium at 300°C. What will happen if the volume of the container is reduced by 25% at 300°C?

The reaction system POCl3(g) POCl(g) + Cl2(g) Is at equilibrium. Which of the following statements describes the behavior of the system if POCl is added to the container?

Write the mass-action expression, c, for the following chemical reaction. Sn2+(aq) + ½O2(g) + 3H2O(l) SnO2(s) + 2H3O+(aq)

Consider the reactions of cadmium with the thiosulfate anion. Cd2+(aq) + S2O32-(aq) Cd(S2O3)(aq) K1 = 8.3 × 103 Cd(S2O3)(aq) + S2O32-(aq) Cd(S2O3)22-(aq) K2 = 2.5 × 102 What is the value for the equilibrium constant for the following reaction? Cd2+(aq) + 2S2O32-(aq) Cd(S2O3)22-(aq)

The equilibrium constant, Kp, for the reaction H2(g) + I2(g) 2HI(g) Is 55.2 at 425°C. A rigid cylinder at that temperature contains 0.127 atm of hydrogen, 0.134 atm of iodine, and 1.055 atm of hydrogen iodide. Is the system at equilibrium?

When a chemical system is at equilibrium,

The reaction system CS2(g) + 4H2(g) CH4(g) + 2H2S(g) Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of carbon disulfide is reduced?

At 25°C, the equilibrium constant Kc for the reaction 2A(aq) B(aq) + C(aq) Is 65. If 2.50 mol of A is added to enough water to prepare 1.00 L of solution, what will the equilibrium concentration of A be?

Nitrogen dioxide decomposes according to the reaction 2NO2(g) 2NO(g) + O2(g) Where Kp = 4.48 × 10-13 at 25°C. What is the value for Kc?

Keys to Studying Chemistry Definitions, Units, and Problem Solving

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces Liquids, Solids, and Phase Changes

The Properties of Mixtures Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics Rates and Mechanisms of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics Entropy, Free Energy, and Reaction Direction

Electrochemistry Chemical Change and Electrical Work

The Elements in Nature and Industry

Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

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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 a solution equilibrium, a change in concentration of a reactant or product does not change K_c.

The following reaction is at equilibrium at a pressure of 1 atm, in a closed container. NaOH(s) + CO₂(g) NaHCO₃(s) ΔH°_rxn < 0 Which, if any, of the following actions will decrease the concentration of CO₂ gas present at equilibrium?

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?

An equilibrium is established in which both the forward (fwd) and the reverse (rev) reactions are elementary. If the equilibrium constant K_c = 1.6 × 10^-2 and the rate constant k_fwd = 8.0 × 10^-7 s^-1 what is the value of k_rev?

Hydrogen sulfide will react with water as shown in the following reactions. H₂S(g) + H₂O(l) H₃O⁺(aq) + HS^-(aq) K₁ = 1.0 × 10^-7 HS^-(aq) + H₂O(l) H₃O⁺(aq) + S^2-(aq) K₂ = ? H₂S(g) + 2H₂O(l) 2H₃O⁺(aq) + S^2-(aq) K₃ = 1.3 × 10^-20 What is the value of K₂?

A container was charged with hydrogen, nitrogen, and ammonia gases at 120°C and the system was allowed to reach equilibrium. What will happen if the volume of the container is increased at constant temperature? 3H₂(g) + N₂(g) 2NH₃(g)

At 25°C, the equilibrium constant K_c for the reaction 2A(g) B(g) + C(g) Is 0.035. A mixture of 8.00 moles of B and 12.00 moles of C in a 20.0 L container is allowed to come to equilibrium. What is the equilibrium concentration of A?

Write the mass-action expression, c, for the following chemical reaction. 2Cu₂₊(aq) + 4I^-(aq) 2CuI(s) + I₂(aq)

Magnesium carbonate dissociates to magnesium oxide and carbon dioxide at elevated temperatures. MgCO₃(s) MgO(s) + CO₂(g) A reaction vessel contains these compounds in equilibrium at 300°C. What will happen if the volume of the container is reduced by 25% at 300°C?

The reaction system POCl₃(g) POCl(g) + Cl₂(g) Is at equilibrium. Which of the following statements describes the behavior of the system if POCl is added to the container?

Write the mass-action expression, c, for the following chemical reaction. Sn²⁺(aq) + ½O₂(g) + 3H₂O(l) SnO₂(s) + 2H₃O⁺(aq)

The equilibrium constant, Kp, for the reaction H₂(g) + I₂(g) 2HI(g) Is 55.2 at 425°C. A rigid cylinder at that temperature contains 0.127 atm of hydrogen, 0.134 atm of iodine, and 1.055 atm of hydrogen iodide. Is the system at equilibrium?

The reaction system CS₂(g) + 4H₂(g) CH₄(g) + 2H₂S(g) Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of carbon disulfide is reduced?

Nitrogen dioxide decomposes according to the reaction 2NO₂(g) 2NO(g) + O₂(g) Where K_p = 4.48 × 10^-13 at 25°C. What is the value for K_c?