Exam 14: Chemical Equilibrium
Exam 1: Matter, Measurement, and Problem Solving120 Questions
Exam 2: Atoms and Elements116 Questions
Exam 3: Molecules, Compounds and Chemical Equations144 Questions
Exam 4: Chemical Quantities and Aqueous Reactions199 Questions
Exam 5: Gases157 Questions
Exam 6: Thermochemistry110 Questions
Exam 7: The Quantum-Mechanical Model of the Atom100 Questions
Exam 8: Periodic Properties of the Elements120 Questions
Exam 9: Chemical Bonding I: Lewis Theory125 Questions
Exam 10: Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and109 Questions
Exam 11: Liquids, Solids, and Intermolecular Forces123 Questions
Exam 12: Solutions127 Questions
Exam 13: Chemical Kinetics125 Questions
Exam 14: Chemical Equilibrium112 Questions
Exam 15: Acids and Bases126 Questions
Exam 16: Aqueous Ionic Equilibrium148 Questions
Exam 17: Free Energy and Thermodynamics103 Questions
Exam 18: Electrochemistry115 Questions
Exam 19: Radioactivity and Nuclear Chemistry105 Questions
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The equilibrium constant is given for two of the reactions below.Determine the value of the missing equilibrium constant.
A(g)+ B(g)⇌ AB(g)Kc = 0.24
AB(g)+ A(g)⇌ A2B(g)Kc = 3.8
2 A(g)+ B(g)⇌ A2B(g)Kc = ?
(Multiple Choice)
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Determine the value of Kp for the following reaction if the equilibrium concentrations are as follows: P(NOCl)eq = 0.22 atm,P(NO)eq = 0.10 atm,P(Cl2)eq = 0.081 atm.
2 NOCl(g)? 2 NO(g)+ Cl2(g)
(Multiple Choice)
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Can the Kp and Kc for a reaction ever have the same value? Why or why not?
(Essay)
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Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [HCl]eq = 0.13 M,[HI]eq = 5.6 × 10-16 M,[Cl2]eq = 0.0019 M.
2 HCl(g)+ I2(s)⇌ 2 HI(g)+ Cl2(g)
(Multiple Choice)
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Consider the following reaction:
CO2(g)+ C(graphite)⇌ 2 CO(g)
A reaction mixture initially contains 0.56 atm CO2 and 0.32 atm CO.Determine the equilibrium pressure of CO if Kp for the reaction at this temperature is 2.25.
(Multiple Choice)
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The reaction below has a Kp value of 3.3 × 10-5.What is the value of Kc for this reaction at 700 K?
2 SO3(g)⇌ 2 SO2(g)+ O2(g)
(Multiple Choice)
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Consider the following reaction and its equilibrium constant:
I2(g)+ Br2(g)⇌ 2 IBr(g)Kc = 1.1 × 102
A reaction mixture contains 0.41 M I2,0.27 M Br2 and 3.5 M IBr.Which of the following statements is true concerning this system?
(Multiple Choice)
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Consider the following reaction at equilibrium.What effect will reducing the volume of the reaction mixture have on the system? Xe(g)+ 2 F2(g)→ XeF4(g)
(Multiple Choice)
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Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium concentration of NO2(g).
N2O4(g)⇌ 2 NO2(g) Kc = 0.21
[N2O4]eq = 0.039 M
(Multiple Choice)
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Consider the following reaction at equilibrium.What effect will reducing the pressure of the reaction mixture have on the system?
Xe(g)+ 2 F2(g)→ XeF4(g)
(Multiple Choice)
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Consider the following reaction at equilibrium.What effect will adding more H2S have on the system?
2 H2S(g)+ 3 O2(g)⇌ 2 H2O(g)+ 2 SO2(g)
(Multiple Choice)
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Consider the following reaction and its equilibrium constant:
4 CuO(s)+ CH4(g)⇌ CO2(g)+ 4 Cu(s)+ 2 H2O(g)Kc = 1.10
A reaction mixture contains 0.22 M CH4,0.67 M CO2 and 1.3 M H2O.Which of the following statements is true concerning this system?
(Multiple Choice)
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Express the equilibrium constant for the following reaction.
2 Na(s)+ 2 H2O(l)⇌ 2 NaOH(aq)+ H2(g)
(Multiple Choice)
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Consider the following reaction,equilibrium concentrations,and equilibrium constant at a particular temperature.Determine the equilibrium pressure of CO.
CO(g)+ 2 H2(g)⇌ CH3OH(l)Kp = 2.25 × 104
P(H2)eq = 0.52 atm
(Multiple Choice)
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The equilibrium constant is equal to 5.00 at 1300 K for the reaction:
2 SO2(g)+ O2(g)⇌ 2 SO3(g).
If initial concentrations are [SO2] = 6.00 M,[O2] = 0.45 M,and [SO3] = 9.00 M,the system is
(Multiple Choice)
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Which statement is true for the following reaction at equilibrium at 25 C?
H2(g)+ Br2(g)⇌ HBr(g);K = 1.9 × 1019
(Multiple Choice)
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Express the equilibrium constant for the following reaction.
P4(s)+ 5 O2(g)⇌ P4O10(s)
(Multiple Choice)
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The equilibrium constant is given for one of the reactions below.Determine the value of the missing equilibrium constant.
2 HD(g)⇌ H2(g)+ D2(g)Kc = 0.28
2 H2(g)+ 2 D2(g)⇌ 4 HD(g)Kc = ?
(Multiple Choice)
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