The combustion of hydrogen in the presence of excess oxygen yields water: 2H2(g)+ O2(g)→ 2H2O (l) The value of ΔS° for this reaction is __________ J/K∙ mol.

A) +405.5 B) -405.5 C) -326.3 D) -265.7 E) +265.7 A) +405.5 B) -405.5 C) -326.3 D) -265.7 E) +265.7

The value of ΔS° for the formation of POCl3 from its constituent elements, P2 (g)+ O2 (g)+ 3Cl2 (g)→ 2POCl3 (g) Is __________ J/K∙ mol.

A) -442.0 B) +771.0 C) -321.0 D) -771.0 E) +321.0 A) -442.0 B) +771.0 C) -321.0 D) -771.0 E) +321.0

Phosphorous and chlorine gases combine to produce phosphorous trichloride: P2 (g)+ 3Cl2 (g)→ 2PCl3 (g) ΔG° at 298 K for this reaction is -642.9 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.5 atm P2, 1.6 atm Cl2, and 0.65 atm PCl3 is __________.

A) -44.2 B) -3.88 × 103 C) -7.28 × 103 D) -708.4 E) -649.5 A) -44.2 B) -3.88 × 103 C) -7.28 × 103 D) -708.4 E) -649.5

The equilibrium constant for the following reaction is 3.5 × 108 at 25°C. N2 (g)+ 3H2 (g) 2NH3 (g) The value of ΔG° for this reaction is __________ kJ/mol.

A) 22 B) -4.1 C) 4.1 D) -49 E) -22 A) 22 B) -4.1 C) 4.1 D) -49 E) -22

Exam 19: Chemical Thermodynamics

The combustion of hydrogen in the presence of excess oxygen yields water: 2H₂(g)+ O₂(g)→ 2H₂O (l) The value of ΔS° for this reaction is __________ J/K∙ mol.

(Multiple Choice)

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Question 101

The value of ΔS° for the catalytic hydrogenation of acetylene to ethane, C₂H₂ (g)+ 2H₂ (g)→ C₂H₆ (g) Is __________ J/K∙ mol.

(Multiple Choice)

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Question 102

Consider the reaction: FeO (s)+ Fe (s)+ O₂ (g)→ Fe₂O₃ (s) Given the following table of thermodynamic data, determine the temperature (in °C)above which the reaction is nonspontaneous.

(Multiple Choice)

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Question 103

The value of ΔG° at 25°C for the decomposition of calcium chloride into its constituent elements, CaCl₂(s)→ Ca (s)+ Cl₂ (g) Is __________ kJ/mol.

(Multiple Choice)

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Question 104

Of the following, the entropy of gaseous __________ is the largest at 25°C and 1 atm.

(Multiple Choice)

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Question 105

For an isothermal process, the entropy change of the surroundings is given by the equation:

(Multiple Choice)

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Question 106

The value of ΔS° for the formation of POCl₃ from its constituent elements, P₂(g)+ O₂ (g)+ 3Cl₂ (g)→ 2POCl₃ (g) Is __________ J/K∙ mol.

(Multiple Choice)

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Question 107

In the Haber process, ammonia is synthesized from nitrogen and hydrogen: N₂ (g)+ 3H₂ (g)→ 2NH₃ (g) ΔG° at 298 K for this reaction is -33.3 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.9 atm N₂, 1.6 atm H₂, and 0.65 atm NH₃ is __________.

(Multiple Choice)

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Question 108

Phosphorous and chlorine gases combine to produce phosphorous trichloride: P₂ (g)+ 3Cl₂ (g)→ 2PCl₃ (g) ΔG° at 298 K for this reaction is -642.9 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.5 atm P₂, 1.6 atm Cl₂, and 0.65 atm PCl₃ is __________.

(Multiple Choice)

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Question 109

The value of ΔS° for the oxidation of solid elemental sulfur to gaseous sulfur dioxide, S (s, rhombic)+ O₂(g)→ SO₂(g) Is __________ J/K∙ mol.

(Multiple Choice)

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Question 110

The vaporization of a substance at its boiling point is an isothermal process

(True/False)

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Question 111

For a given reaction, ΔH = +35.5 kJ/mol and ΔS = +83.6 J/K-mol. The reaction is spontaneous __________. Assume that ΔH and ΔS do not vary with temperature.

(Multiple Choice)

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Question 112

The value of ΔS° for the decomposition of calcium chloride into its constituent elements, CaCl₂(s)→ Ca (s)+ Cl₂ (g) Is __________ J/K∙ mol.

(Multiple Choice)

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Question 113

The first law of thermodynamics can be given as __________.

(Multiple Choice)

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Question 114

The equilibrium constant for the following reaction is 3.5 × 10⁸ at 25°C. N₂ (g)+ 3H₂ (g) 2NH₃ (g) The value of ΔG° for this reaction is __________ kJ/mol.

(Multiple Choice)

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Question 115

The value of ΔS° for the formation of phosphorous trichloride from its constituent elements, P₂ (g)+ 3Cl₂ (g)→ 2PCl₃ (g) Is __________ J/K∙ mol.

(Multiple Choice)

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Question 116

Given the thermodynamic data in the table below, calculate the equilibrium constant (at 298 K)for the reaction: 2SO₂ (g)+ O₂ (g) 2SO₃ (g)

(Multiple Choice)

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Question 117

The value of ΔG° at 25°C for the decomposition of gaseous sulfur dioxide to solid elemental sulfur and gaseous oxygen, SO₂ (g)→ S (s, rhombic)+ O₂ (g) Is __________ kJ/mol.

(Multiple Choice)

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Question 118

Which one of the following processes produces a decrease in the entropy of the system?

(Multiple Choice)

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Question 119

The value of ΔS° for the decomposition of gaseous sulfur dioxide to solid elemental sulfur and gaseous oxygen, SO₂(g)→ S (s, rhombic)+ O₂(g) Is __________ J/K∙ mol.

(Multiple Choice)

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Question 120

Showing 101 - 120 of 120

Exam 19: Chemical Thermodynamics

The combustion of hydrogen in the presence of excess oxygen yields water: 2H2(g)+ O2(g)→ 2H2O (l) The value of ΔS° for this reaction is __________ J/K∙ mol.

The value of ΔS° for the catalytic hydrogenation of acetylene to ethane, C2H2 (g)+ 2H2 (g)→ C2H6 (g) Is __________ J/K∙ mol.

Consider the reaction: FeO (s)+ Fe (s)+ O2 (g)→ Fe2O3 (s) Given the following table of thermodynamic data, determine the temperature (in °C)above which the reaction is nonspontaneous.

The value of ΔG° at 25°C for the decomposition of calcium chloride into its constituent elements, CaCl2 (s)→ Ca (s)+ Cl2 (g) Is __________ kJ/mol.

Of the following, the entropy of gaseous __________ is the largest at 25°C and 1 atm.

For an isothermal process, the entropy change of the surroundings is given by the equation:

The value of ΔS° for the formation of POCl3 from its constituent elements, P2 (g)+ O2 (g)+ 3Cl2 (g)→ 2POCl3 (g) Is __________ J/K∙ mol.

In the Haber process, ammonia is synthesized from nitrogen and hydrogen: N2 (g)+ 3H2 (g)→ 2NH3 (g) ΔG° at 298 K for this reaction is -33.3 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.9 atm N2, 1.6 atm H2, and 0.65 atm NH3 is __________.

Phosphorous and chlorine gases combine to produce phosphorous trichloride: P2 (g)+ 3Cl2 (g)→ 2PCl3 (g) ΔG° at 298 K for this reaction is -642.9 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.5 atm P2, 1.6 atm Cl2, and 0.65 atm PCl3 is __________.

The value of ΔS° for the oxidation of solid elemental sulfur to gaseous sulfur dioxide, S (s, rhombic)+ O2(g)→ SO2(g) Is __________ J/K∙ mol.

The vaporization of a substance at its boiling point is an isothermal process

For a given reaction, ΔH = +35.5 kJ/mol and ΔS = +83.6 J/K-mol. The reaction is spontaneous __________. Assume that ΔH and ΔS do not vary with temperature.

The value of ΔS° for the decomposition of calcium chloride into its constituent elements, CaCl2 (s)→ Ca (s)+ Cl2 (g) Is __________ J/K∙ mol.

The first law of thermodynamics can be given as __________.

The equilibrium constant for the following reaction is 3.5 × 108 at 25°C. N2 (g)+ 3H2 (g) 2NH3 (g) The value of ΔG° for this reaction is __________ kJ/mol.

The value of ΔS° for the formation of phosphorous trichloride from its constituent elements, P2 (g)+ 3Cl2 (g)→ 2PCl3 (g) Is __________ J/K∙ mol.

Given the thermodynamic data in the table below, calculate the equilibrium constant (at 298 K)for the reaction: 2SO2 (g)+ O2 (g) 2SO3 (g)

The value of ΔG° at 25°C for the decomposition of gaseous sulfur dioxide to solid elemental sulfur and gaseous oxygen, SO2 (g)→ S (s, rhombic)+ O2 (g) Is __________ kJ/mol.

Which one of the following processes produces a decrease in the entropy of the system?

The value of ΔS° for the decomposition of gaseous sulfur dioxide to solid elemental sulfur and gaseous oxygen, SO2 (g)→ S (s, rhombic)+ O2 (g) Is __________ J/K∙ mol.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Electrochemistry

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Chemistry of the Nonmetals

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The combustion of hydrogen in the presence of excess oxygen yields water: 2H₂(g)+ O₂(g)→ 2H₂O (l) The value of ΔS° for this reaction is __________ J/K∙ mol.

The value of ΔS° for the catalytic hydrogenation of acetylene to ethane, C₂H₂ (g)+ 2H₂ (g)→ C₂H₆ (g) Is __________ J/K∙ mol.

Consider the reaction: FeO (s)+ Fe (s)+ O₂ (g)→ Fe₂O₃ (s) Given the following table of thermodynamic data, determine the temperature (in °C)above which the reaction is nonspontaneous.

The value of ΔG° at 25°C for the decomposition of calcium chloride into its constituent elements, CaCl₂(s)→ Ca (s)+ Cl₂ (g) Is __________ kJ/mol.

The value of ΔS° for the formation of POCl₃ from its constituent elements, P₂(g)+ O₂ (g)+ 3Cl₂ (g)→ 2POCl₃ (g) Is __________ J/K∙ mol.

In the Haber process, ammonia is synthesized from nitrogen and hydrogen: N₂ (g)+ 3H₂ (g)→ 2NH₃ (g) ΔG° at 298 K for this reaction is -33.3 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.9 atm N₂, 1.6 atm H₂, and 0.65 atm NH₃ is __________.

Phosphorous and chlorine gases combine to produce phosphorous trichloride: P₂ (g)+ 3Cl₂ (g)→ 2PCl₃ (g) ΔG° at 298 K for this reaction is -642.9 kJ/mol. The value of ΔG at 298 K for a reaction mixture that consists of 1.5 atm P₂, 1.6 atm Cl₂, and 0.65 atm PCl₃ is __________.

The value of ΔS° for the oxidation of solid elemental sulfur to gaseous sulfur dioxide, S (s, rhombic)+ O₂(g)→ SO₂(g) Is __________ J/K∙ mol.

The value of ΔS° for the decomposition of calcium chloride into its constituent elements, CaCl₂(s)→ Ca (s)+ Cl₂ (g) Is __________ J/K∙ mol.

The equilibrium constant for the following reaction is 3.5 × 10⁸ at 25°C. N₂ (g)+ 3H₂ (g) 2NH₃ (g) The value of ΔG° for this reaction is __________ kJ/mol.

The value of ΔS° for the formation of phosphorous trichloride from its constituent elements, P₂ (g)+ 3Cl₂ (g)→ 2PCl₃ (g) Is __________ J/K∙ mol.

Given the thermodynamic data in the table below, calculate the equilibrium constant (at 298 K)for the reaction: 2SO₂ (g)+ O₂ (g) 2SO₃ (g)

The value of ΔG° at 25°C for the decomposition of gaseous sulfur dioxide to solid elemental sulfur and gaseous oxygen, SO₂ (g)→ S (s, rhombic)+ O₂ (g) Is __________ kJ/mol.

The value of ΔS° for the decomposition of gaseous sulfur dioxide to solid elemental sulfur and gaseous oxygen, SO₂(g)→ S (s, rhombic)+ O₂(g) Is __________ J/K∙ mol.