Which of the following is true for pure oxygen gas, O2(g) at 25°C?

A) .F1F1F1S1F1F1F10H° f > 0 B) .F1F1F1S1F1F1F10H° f f > 0 D) .F1F1F1S1F1F1F10G° f 0 A) .F1F1F1S1F1F1F10H° f > 0 B) .F1F1F1S1F1F1F10H° f f > 0 D) .F1F1F1S1F1F1F10G° f 0

Which relationship best describes F1F1F1S1F1F1F10S° for the following reaction? 8H2(g) + S8(s) F1F1F1S1F1F1F10 8H2S(g)

A) .F1F1F1S1F1F1F10S° = F1F1F1S1F1F1F10H° B) .F1F1F1S1F1F1F10S° = F1F1F1S1F1F1F10H°/T C) .F1F1F1S1F1F1F10S° F1F1F1S1F1F1F10 0 D) .F1F1F1S1F1F1F10S° 0 A) .F1F1F1S1F1F1F10S° = F1F1F1S1F1F1F10H° B) .F1F1F1S1F1F1F10S° = F1F1F1S1F1F1F10H°/T C) .F1F1F1S1F1F1F10S° F1F1F1S1F1F1F10 0 D) .F1F1F1S1F1F1F10S° 0

Which relationship or statement best describes F1F1F1S1F1F1F10S° for the following reaction? BaCl2(aq) + Na2SO4(aq) F1F1F1S1F1F1F10 BaSO4(s) + 2NaCl(aq)

A) .F1F1F1S1F1F1F10S° F1F1F1S1F1F1F10 0 B) .F1F1F1S1F1F1F10S° 0 D) .F1F1F1S1F1F1F10S° = F1F1F1S1F1F1F10H°/T E) More information is needed to make a reasonable prediction. A) .F1F1F1S1F1F1F10S° F1F1F1S1F1F1F10 0 B) .F1F1F1S1F1F1F10S° 0 D) .F1F1F1S1F1F1F10S° = F1F1F1S1F1F1F10H°/T E) More information is needed to make a reasonable prediction.

Use the given data at 298 K to calculate F1F1F1S1F1F1F10G° for the reaction

A) 129.3 kJ B) 133.6 kJ C) 196.0 kJ D) 199.8 kJ E) 229.6 kJ A) 129.3 kJ B) 133.6 kJ C) 196.0 kJ D) 199.8 kJ E) 229.6 kJ

Which relationship or statement best describes F1F1F1S1F1F1F10S° for the following reaction? 2NH3(g) + 2ClF3(g) F1F1F1S1F1F1F10 6HF(g) + N2(g) + Cl2(g)

A) .F1F1F1S1F1F1F10S° F1F1F1S1F1F1F10 0 B) .F1F1F1S1F1F1F10S° 0 D) .F1F1F1S1F1F1F10S° = F1F1F1S1F1F1F10H°/T E) More information is needed to make a reasonable prediction. A) .F1F1F1S1F1F1F10S° F1F1F1S1F1F1F10 0 B) .F1F1F1S1F1F1F10S° 0 D) .F1F1F1S1F1F1F10S° = F1F1F1S1F1F1F10H°/T E) More information is needed to make a reasonable prediction.

Elemental boron can be formed by reaction of boron trichloride with hydrogen. If F1F1F1S1F1F1F10S° = 80.3 J/K for the reaction above, what is S° for BCl3(g)?

A) -18.2 J/KF1F1F1S1F1F1F10mol B) 18.2 J/KF1F1F1S1F1F1F10mol C) 290.1 J/KF1F1F1S1F1F1F10mol D) 355.4 J/KF1F1F1S1F1F1F10mol E) 450.6 J/KF1F1F1S1F1F1F10mol A) -18.2 J/KF1F1F1S1F1F1F10mol B) 18.2 J/KF1F1F1S1F1F1F10mol C) 290.1 J/KF1F1F1S1F1F1F10mol D) 355.4 J/KF1F1F1S1F1F1F10mol E) 450.6 J/KF1F1F1S1F1F1F10mol

Sulfuryl dichloride is formed when sulfur dioxide reacts with chlorine. The data refer to 298 K. SO2(g) + Cl2(g) F1F1F1S1F1F1F10 SO2Cl2(g) What is the value of F1F1F1S1F1F1F10G° for this reaction at 600 K?

A) -162.8 kJ B) -40.1 kJ C) -28.4 kJ D) 28.4 kJ E) 162.8 kJ A) -162.8 kJ B) -40.1 kJ C) -28.4 kJ D) 28.4 kJ E) 162.8 kJ

Given: H2O(l) F1F1F1S1F1F1F10 H2O(s) F1F1F1S1F1F1F10H° = -6.02 kJ at 273K Calculate the entropy change of the surroundings (F1F1F1S1F1F1F10Ssurr) when one mole of water freezes at 0 °C and a pressure of one atmosphere.

A) 22.1 J/K B) -22.1 J/K C) 397 J/K D) -397 J/K E) 0.022 J/K A) 22.1 J/K B) -22.1 J/K C) 397 J/K D) -397 J/K E) 0.022 J/K

Exam 20: Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Explore all topics

Consider the reaction 11ec6d53_97e1_49fd_9cd1_030bf8888a28_TB5833_ If the concentrations of the Cu⁺ and I^- ions in equilibrium at 298 K are both equal to 1.03 × 10^-6 M, what is the value of G° for the reaction?

(Multiple Choice)

5.0/5

(38)

Question 41

In the expression, S = k ln W, W is called the number of microstates. Explain clearly the meaning of the word "microstate", and why a system under a given set of conditions normally has many microstates.

(Essay)

4.8/5

(35)

Question 42

Which of the following is true for pure oxygen gas, O₂(g) at 25°C?

(Multiple Choice)

4.8/5

(35)

Question 43

In order for a process to be spontaneous,

(Multiple Choice)

4.8/5

(39)

Question 44

Which relationship best describes S° for the following reaction? 8H₂(g) + S₈(s)  8H₂S(g)

(Multiple Choice)

4.9/5

(29)

Question 45

The reaction of methane with water to form carbon dioxide and hydrogen is non-spontaneous at 298 K. At what temperature will this system make the transition from non-spontaneous to spontaneous? The data refer to 298 K.

(Multiple Choice)

4.9/5

(39)

Question 46

Which relationship or statement best describes S° for the following reaction? BaCl₂(aq) + Na₂SO₄(aq)  BaSO₄(s) + 2NaCl(aq)

(Multiple Choice)

4.8/5

(40)

Question 47

Consider the figure which shows G° for a chemical process plotted against absolute temperature. From this plot, it is reasonable to conclude that:

(Multiple Choice)

4.8/5

(33)

Question 48

For what signs of H and S will a process a. be spontaneous at high temperatures but not at low temperatures? b. not be spontaneous at any temperatures?

(Essay)

4.8/5

(31)

Question 49

Use the given data at 298 K to calculate G° for the reaction

(Multiple Choice)

4.7/5

(40)

Question 50

In order for a process to be spontaneous,

(Multiple Choice)

4.8/5

(39)

Question 51

Which relationship or statement best describes S° for the following reaction? 2NH₃(g) + 2ClF₃(g)  6HF(g) + N₂(g) + Cl₂(g)

(Multiple Choice)

4.8/5

(43)

Question 52

Elemental boron can be formed by reaction of boron trichloride with hydrogen. If S° = 80.3 J/K for the reaction above, what is S° for BCl₃(g)?

(Multiple Choice)

4.9/5

(34)

Question 53

Consider the figure which shows G° for a chemical process plotted against absolute temperature. From this plot, it is reasonable to conclude that:

(Multiple Choice)

4.9/5

(33)

Question 54

Which of the following is necessary for a process to be spontaneous?

(Multiple Choice)

4.8/5

(46)

Question 55

Sulfuryl dichloride is formed when sulfur dioxide reacts with chlorine. The data refer to 298 K. SO₂(g) + Cl₂(g)  SO₂Cl₂(g) What is the value of G° for this reaction at 600 K?

(Multiple Choice)

4.9/5

(22)

Question 56

The higher the pressure of a gas sample, the greater is its entropy.

(True/False)

4.8/5

(39)

Question 57

In which one of these pairs will the entropy of the first substance be greater than that of the second? Assume P and T are the same for each pair, unless stated otherwise.

(Multiple Choice)

4.8/5

(31)

Question 58

For any reaction, if G° > 0, then K < 1.

(True/False)

4.9/5

(37)

Question 59

Given: H₂O(l)  H₂O(s) H° = -6.02 kJ at 273K Calculate the entropy change of the surroundings (S_surr) when one mole of water freezes at 0 °C and a pressure of one atmosphere.

(Multiple Choice)

4.9/5

(41)

Question 60

Showing 41 - 60 of 94

Exam 20: Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Consider the reaction 11ec6d53_97e1_49fd_9cd1_030bf8888a28_TB5833_ If the concentrations of the Cu+ and I- ions in equilibrium at 298 K are both equal to 1.03 × 10-6 M, what is the value of G° for the reaction?

In the expression, S = k ln W, W is called the number of microstates. Explain clearly the meaning of the word "microstate", and why a system under a given set of conditions normally has many microstates.

Which of the following is true for pure oxygen gas, O2(g) at 25°C?

In order for a process to be spontaneous,

Which relationship best describes S° for the following reaction? 8H2(g) + S8(s)  8H2S(g)

The reaction of methane with water to form carbon dioxide and hydrogen is non-spontaneous at 298 K. At what temperature will this system make the transition from non-spontaneous to spontaneous? The data refer to 298 K.

Which relationship or statement best describes S° for the following reaction? BaCl2(aq) + Na2SO4(aq)  BaSO4(s) + 2NaCl(aq)

Consider the figure which shows G° for a chemical process plotted against absolute temperature. From this plot, it is reasonable to conclude that:

For what signs of H and S will a process a. be spontaneous at high temperatures but not at low temperatures? b. not be spontaneous at any temperatures?

Use the given data at 298 K to calculate G° for the reaction

In order for a process to be spontaneous,

Which relationship or statement best describes S° for the following reaction? 2NH3(g) + 2ClF3(g)  6HF(g) + N2(g) + Cl2(g)

Elemental boron can be formed by reaction of boron trichloride with hydrogen. If S° = 80.3 J/K for the reaction above, what is S° for BCl3(g)?

Consider the figure which shows G° for a chemical process plotted against absolute temperature. From this plot, it is reasonable to conclude that:

Which of the following is necessary for a process to be spontaneous?

Sulfuryl dichloride is formed when sulfur dioxide reacts with chlorine. The data refer to 298 K. SO2(g) + Cl2(g)  SO2Cl2(g) What is the value of G° for this reaction at 600 K?

The higher the pressure of a gas sample, the greater is its entropy.

In which one of these pairs will the entropy of the first substance be greater than that of the second? Assume P and T are the same for each pair, unless stated otherwise.

For any reaction, if G° > 0, then K < 1.

Given: H2O(l)  H2O(s) H° = -6.02 kJ at 273K Calculate the entropy change of the surroundings (Ssurr) when one mole of water freezes at 0 °C and a pressure of one atmosphere.

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

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

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

Consider the reaction 11ec6d53_97e1_49fd_9cd1_030bf8888a28_TB5833_ If the concentrations of the Cu⁺ and I^- ions in equilibrium at 298 K are both equal to 1.03 × 10^-6 M, what is the value of G° for the reaction?

Which of the following is true for pure oxygen gas, O₂(g) at 25°C?

Which relationship best describes S° for the following reaction? 8H₂(g) + S₈(s)  8H₂S(g)

Which relationship or statement best describes S° for the following reaction? BaCl₂(aq) + Na₂SO₄(aq)  BaSO₄(s) + 2NaCl(aq)

Which relationship or statement best describes S° for the following reaction? 2NH₃(g) + 2ClF₃(g)  6HF(g) + N₂(g) + Cl₂(g)

Elemental boron can be formed by reaction of boron trichloride with hydrogen. If S° = 80.3 J/K for the reaction above, what is S° for BCl₃(g)?

Sulfuryl dichloride is formed when sulfur dioxide reacts with chlorine. The data refer to 298 K. SO₂(g) + Cl₂(g)  SO₂Cl₂(g) What is the value of G° for this reaction at 600 K?

Given: H₂O(l)  H₂O(s) H° = -6.02 kJ at 273K Calculate the entropy change of the surroundings (S_surr) when one mole of water freezes at 0 °C and a pressure of one atmosphere.