The following reaction is at equilibrium in a sealed container. N2(g) + 3H2(g) 2NH3(g) F1F1F1S1F1F1F10H°rxn c?

A) adding a catalyst B) adding more N2 C) increasing the pressure D) lowering the temperature E) none of the above A) adding a catalyst B) adding more N2 C) increasing the pressure D) lowering the temperature E) none of the above

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 the above A) 2.17 × 10-8 B) 4.10 × 10-4 C) 7.65 × 10-2 D) 7.75 E) none of the above

Exam 17: Equilibrium: the Extent of Chemical Reactions

a. State Le Chatelier's principle b. The following reaction is at equilibrium in a closed container: 2Fe(OH)₃(s) Fe₂O₃(s) + 3H₂O(g) H°_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 catalyst

(Essay)

4.9/5

(37)

Question 21

Consider the equilibrium: A(s) B(s) + C(g) H°_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

(Essay)

4.7/5

(38)

Question 22

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

(Multiple Choice)

4.8/5

(32)

Question 23

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

(Multiple Choice)

4.8/5

(46)

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)

4.8/5

(36)

Question 25

Consider the equilibrium reaction: H₂(g) + Br₂(g) 2HBr(g) Which of the following correctly describes the relationship between K_c and K_p for the reaction?

(Multiple Choice)

4.9/5

(38)

Question 26

Which of the following has an effect on the magnitude of the equilibrium constant?

(Multiple Choice)

4.9/5

(25)

Question 27

The reaction quotient for a gas phase reaction has a value of 2000. If the number of moles of reactants in the reaction equation is equal to that of the products, which of the following statements is definitely true?

(Multiple Choice)

4.8/5

(39)

Question 28

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)

4.8/5

(32)

Question 29

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)

4.9/5

(28)

Question 30

Once a reaction system reaches equilibrium, the concentrations of reactions and products no longer change.

(True/False)

4.8/5

(38)

Question 31

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)

4.7/5

(41)

Question 32

Write the mass-action expression, Q_c, for the following chemical reaction. MgO(s) + SO₂(g) + O₂(g) MgSO₄(s)

(Multiple Choice)

4.8/5

(41)

Question 33

Methanol can be synthesized by combining carbon monoxide and hydrogen. CO(g) + 2H₂(g) CH₃OH(g) H°_rxn = -90.7 kJ A reaction vessel contains these compounds at equilibrium. What effect will be seen when equilibrium is re-established after decreasing the temperature by 45°C?

(Multiple Choice)

4.8/5

(34)

Question 34

At 25°C, the equilibrium constant K_c 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)

4.8/5

(41)

Question 35

N₂(g) + O₂(g) 2NO(g) K_c = 4.8 × 10^-31 2NOBr(g) 2NO(g) + Br₂(g) K_c = 0.50 Given the above equilibrium constant data at 25 °C, what is the value of K_c at this temperature for the reaction 2NOBr(g) N₂(g) + O₂(g) + Br₂(g)?

(Multiple Choice)

4.7/5

(37)

Question 36

A mixture of 0.600 mol of bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C. Br₂(g) + I₂(g) 2IBr(g) When the mixture has come to equilibrium, the concentration of iodine monobromide is 1.190 M. What is the equilibrium constant for this reaction at 350°C?

(Multiple Choice)

4.9/5

(37)

Question 37

The equilibrium constant, K_p, has a value of 6.5 × 10^-4 at 308 K for the reaction of nitrogen monoxide with chlorine. 2NO(g) + Cl₂(g) 2NOCl(g) What is the value of K_c?

(Multiple Choice)

4.8/5

(45)

Question 38

The reaction system POCl₃(g) POCl(g) + Cl₂(g) Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of chlorine is reduced by 50%?

(Multiple Choice)

4.8/5

(48)

Question 39

The Haber process for ammonia synthesis is exothermic: N₂(g) + 3H₂(g) 2NH₃(g) H° = -92 kJ If the equilibrium constant K_c for this process at 500.°C is 6.0 × 10^-2, what is its value at 300.°C?

(Short Answer)

4.9/5

(35)

Question 40

Showing 21 - 40 of 104

Exam 17: Equilibrium: the Extent of Chemical Reactions

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

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

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?

Consider the equilibrium reaction: H2(g) + Br2(g) 2HBr(g) Which of the following correctly describes the relationship between Kc and Kp for the reaction?

Which of the following has an effect on the magnitude of the equilibrium constant?

The reaction quotient for a gas phase reaction has a value of 2000. If the number of moles of reactants in the reaction equation is equal to that of the products, which of the following statements is definitely true?

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 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?

Once a reaction system reaches equilibrium, the concentrations of reactions and products no longer change.

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)

Write the mass-action expression, Qc , for the following chemical reaction. MgO(s) + SO2(g) + O2(g) MgSO4(s)

Methanol can be synthesized by combining carbon monoxide and hydrogen. CO(g) + 2H2(g) CH3OH(g) H°rxn = -90.7 kJ A reaction vessel contains these compounds at equilibrium. What effect will be seen when equilibrium is re-established after decreasing the temperature by 45°C?

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?

N2(g) + O2(g) 2NO(g) Kc = 4.8 × 10-31 2NOBr(g) 2NO(g) + Br2(g) Kc = 0.50 Given the above equilibrium constant data at 25 °C, what is the value of Kc at this temperature for the reaction 2NOBr(g) N2(g) + O2(g) + Br2(g)?

A mixture of 0.600 mol of bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C. Br2(g) + I2(g) 2IBr(g) When the mixture has come to equilibrium, the concentration of iodine monobromide is 1.190 M. What is the equilibrium constant for this reaction at 350°C?

The equilibrium constant, Kp, has a value of 6.5 × 10-4 at 308 K for the reaction of nitrogen monoxide with chlorine. 2NO(g) + Cl2(g) 2NOCl(g) What is the value of Kc?

The reaction system POCl3(g) POCl(g) + Cl2(g) Is at equilibrium. Which of the following statements describes the behavior of the system if the partial pressure of chlorine is reduced by 50%?

The Haber process for ammonia synthesis is exothermic: N2(g) + 3H2(g) 2NH3(g) H° = -92 kJ If the equilibrium constant Kc for this process at 500.°C is 6.0 × 10-2, what is its value at 300.°C?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The 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: Bonding, Structure, and Reactivity

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 the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

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

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?

Consider the equilibrium reaction: H₂(g) + Br₂(g) 2HBr(g) Which of the following correctly describes the relationship between K_c and K_p for the reaction?

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?

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)

Write the mass-action expression, Q_c, for the following chemical reaction. MgO(s) + SO₂(g) + O₂(g) MgSO₄(s)

Methanol can be synthesized by combining carbon monoxide and hydrogen. CO(g) + 2H₂(g) CH₃OH(g) H°_rxn = -90.7 kJ A reaction vessel contains these compounds at equilibrium. What effect will be seen when equilibrium is re-established after decreasing the temperature by 45°C?

At 25°C, the equilibrium constant K_c 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?

N₂(g) + O₂(g) 2NO(g) K_c = 4.8 × 10^-31 2NOBr(g) 2NO(g) + Br₂(g) K_c = 0.50 Given the above equilibrium constant data at 25 °C, what is the value of K_c at this temperature for the reaction 2NOBr(g) N₂(g) + O₂(g) + Br₂(g)?

A mixture of 0.600 mol of bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C. Br₂(g) + I₂(g) 2IBr(g) When the mixture has come to equilibrium, the concentration of iodine monobromide is 1.190 M. What is the equilibrium constant for this reaction at 350°C?

The equilibrium constant, K_p, has a value of 6.5 × 10^-4 at 308 K for the reaction of nitrogen monoxide with chlorine. 2NO(g) + Cl₂(g) 2NOCl(g) What is the value of K_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 the partial pressure of chlorine is reduced by 50%?

The Haber process for ammonia synthesis is exothermic: N₂(g) + 3H₂(g) 2NH₃(g) H° = -92 kJ If the equilibrium constant K_c for this process at 500.°C is 6.0 × 10^-2, what is its value at 300.°C?