Modified Mastering Chemistry with Pearson eText -- ValuePack Access Card -- for Chemistry: A Molecular Approach (3rd Edition)
3rd Edition
ISBN: 9780321903518
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 17, Problem 33E
Interpretation Introduction
Interpretation: The signs of
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Chapter 17 Solutions
Modified Mastering Chemistry with Pearson eText -- ValuePack Access Card -- for Chemistry: A Molecular Approach (3rd Edition)
Ch. 17 - Prob. 1SAQCh. 17 - Prob. 2SAQCh. 17 - Q3. Arrange the gases—F2, Ar, and CH3F—in order of...Ch. 17 - Q5. A reaction has a ΔHrxn = 54.2 kJ. Calculate...Ch. 17 - Prob. 5SAQCh. 17 - Q7. Use standard entropies to calculate for the...Ch. 17 - Q8. Use standard free energies of formation to...Ch. 17 - Q9. Find ΔG$$ for the reaction 2 A + B → 2 C from...Ch. 17 - Prob. 9SAQCh. 17 - Prob. 10SAQ
Ch. 17 - Prob. 11SAQCh. 17 - Prob. 12SAQCh. 17 - Prob. 13SAQCh. 17 - Prob. 14SAQCh. 17 - Prob. 15SAQCh. 17 - 1. What is the first law of thermodynamics, and...Ch. 17 - Prob. 2ECh. 17 - 3. What is a perpetual motion machine? Can such a...Ch. 17 - 4. Is it more efficient to heat your home with a...Ch. 17 - 5. What is a spontaneous process? Provide an...Ch. 17 - Prob. 6ECh. 17 - Prob. 7ECh. 17 - Prob. 8ECh. 17 - Prob. 9ECh. 17 - Prob. 10ECh. 17 - Prob. 11ECh. 17 - Prob. 12ECh. 17 - Prob. 13ECh. 17 - Prob. 14ECh. 17 - Prob. 15ECh. 17 - 16. Predict the spontaneity of a reaction (and the...Ch. 17 - 17. State the third law of thermodynamics and...Ch. 17 - 18. Why is the standard entropy of a substance in...Ch. 17 - Prob. 19ECh. 17 - Prob. 20ECh. 17 - 21. What are three different methods to calculate...Ch. 17 - Prob. 22ECh. 17 - Prob. 23ECh. 17 - Prob. 24ECh. 17 - Prob. 25ECh. 17 - Prob. 26ECh. 17 - 27. Which of these processes is spontaneous?
a....Ch. 17 - 28. Which of these processes are nonspontaneous?...Ch. 17 - 29. Two systems, each composed of two particles...Ch. 17 - 30. Two systems, each composed of three particles...Ch. 17 - 35. Without doing any calculations, determine the...Ch. 17 - 36. Without doing any calculations, determine the...Ch. 17 - Prob. 33ECh. 17 - 38. Without doing any calculations, determine the...Ch. 17 - 39. Calculate ΔSsurr at the indicated temperature...Ch. 17 - Prob. 36ECh. 17 - 41. Given the values of ΔH$$, ΔS$$, and T,...Ch. 17 - Prob. 38ECh. 17 - Prob. 39ECh. 17 - 4440. Calculate the change in Gibbs free energy...Ch. 17 - Calculate the free energy change for this reaction...Ch. 17 - Prob. 42ECh. 17 - Prob. 43ECh. 17 - Prob. 44ECh. 17 - Prob. 45ECh. 17 - 50. What is the molar entropy of a pure crystal at...Ch. 17 - Prob. 47ECh. 17 - 52. For each pair of substances, choose the one...Ch. 17 - 53. Rank each set of substances in order of...Ch. 17 - 54. Rank each set of substances in order of...Ch. 17 - Prob. 51ECh. 17 - Prob. 52ECh. 17 - Prob. 53ECh. 17 - Prob. 54ECh. 17 - Prob. 55ECh. 17 - Prob. 56ECh. 17 - Prob. 57ECh. 17 - 62. For each reaction, calculate , , and at 25 °C...Ch. 17 - 63. Use standard free energies of formation to...Ch. 17 - 64. Use standard free energies of formation to...Ch. 17 - 65. Consider the reaction:
2 NO(g) + O2(g) → 2...Ch. 17 - Prob. 62ECh. 17 - 67. Determine ΔG° for the reaction:
Fe2O3(s) + 3...Ch. 17 - 68. Calculate for the reaction:
CaCO3(s) → CaO(s)...Ch. 17 - 69. Consider the sublimation of iodine at 25.0 °C...Ch. 17 - 70. Consider the evaporation of methanol at 25.0...Ch. 17 - 71. Consider the reaction:
CH3OH(g) CO(g) + 2...Ch. 17 - Prob. 68ECh. 17 - Prob. 69ECh. 17 - Prob. 70ECh. 17 - Prob. 71ECh. 17 - 7762. Consider the reaction:
I2(g) + Cl2(g) 2...Ch. 17 - 77. Estimate the value of the equilibrium constant...Ch. 17 - 78. Estimate the value of the equilibrium constant...Ch. 17 - 79. Consider the reaction:
H2(g) + I2(g) 2...Ch. 17 - Prob. 76ECh. 17 - 81. The change in enthalpy () for a reaction is...Ch. 17 - Prob. 78ECh. 17 - 83. Determine the sign of ΔSsys for each...Ch. 17 - 84. Determine the sign of ΔSsys for each...Ch. 17 - 85. Our atmosphere is composed primarily of...Ch. 17 - Prob. 82ECh. 17 - 87. Ethene (C2H4) can be halogenated by the...Ch. 17 - 88. H2 reacts with the halogens (X2) according to...Ch. 17 - 89. Consider this reaction occurring at 298...Ch. 17 - 90. Consider this reaction occurring at 298...Ch. 17 - Prob. 87ECh. 17 - Prob. 88ECh. 17 - 93. These reactions are important in catalytic...Ch. 17 - Prob. 90ECh. 17 - Prob. 91ECh. 17 - Prob. 92ECh. 17 - 97. Consider the reaction X2(g) → 2 X(g). When a...Ch. 17 - 98. Dinitrogen tetroxide decomposes to nitrogen...Ch. 17 - 99. Indicate and explain the sign of ΔSuniv for...Ch. 17 - Prob. 96ECh. 17 - Prob. 97ECh. 17 - Prob. 98ECh. 17 - Prob. 99ECh. 17 - Prob. 100ECh. 17 - Prob. 101ECh. 17 - Prob. 102ECh. 17 - Prob. 103ECh. 17 - 108. The salt ammonium nitrate can follow three...Ch. 17 - 109. Given the data, calculate ΔSvap for each of...Ch. 17 - Prob. 106ECh. 17 - Prob. 107ECh. 17 - Prob. 108ECh. 17 - Prob. 109ECh. 17 - 114. Which statement is true?
a. A reaction in...Ch. 17 - Prob. 111ECh. 17 - Prob. 112ECh. 17 - Prob. 113E
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- Solid NH4NO3 is placed in a beaker containing water at 25 C. When the solid has completely dissolved, the temperature of the solution is 23.5 C. (a) Was the process exothermic or endothermic? (b) Was the process spontaneous? (c) Did the entropy of the system increase? (d) Did the entropy of the universe increase?arrow_forwardThe free energy for a reaction decreases as temperature increases. Explain how this observation is used to determine the sign of either H or S.arrow_forwardIndicate whether the following processes are spontaneous or nonspontaneous. (a) Liquid water freezing at a temperature below its freezing point (b) Liquid water freezing at a temperature above its freezing point (c) The combustion of gasoline (d) A ball thrown into the air (e) A raindrop falling to the ground (f) Iron rusting in a moist atmospherearrow_forward
- What is the third law of thermodynamics? What are standard entropy values, S, and how are these S values (listed in Appendix 4) used to calculate S for a reaction? How would you use Hesss law to calculate S for a reaction? What does the superscript indicate? Predicting the sign of S for a reaction is an important skill to master. For a gas-phase reaction, what do you concentrate on to predict the sign of S? For a phase change, what do you concentrate on to predict the sign of S? That is, how are Ssolid, Sliquid, and Sgas related to one another? When a solute dissolves in water, what is usually the sign of S for this process?arrow_forwardFor each of the following processes, identify the systemand the surroundings. Identify those processes that arespontaneous. For each spontaneous process, identify theconstraint that has been removed to enable the process to occur: Ammonium nitrate dissolves in water. Hydrogen and oxygen explode in a closed bomb. A rubber band is rapidly extended by a hangingweight. The gas in a chamber is slowly compressed by aweighted piston. A glass shatters on the floor.arrow_forwardIdentify each of the processes listed as spontaneous or nons-pontaneous. For each nonspontaneous process, describe the corresponding spontaneous process in the opposite direction. (a) A group of cheerleaders builds a human pyramid. (b) Table salt dissolves in water. (c) A cup of cold coffee in a room becomes steaming hot. (d) Water molecules in the air are converted to hydrogen and oxygen gases. (e) A person peels an orange, and you smell it from across the room.arrow_forward
- Consider the reaction of 2 mol H2(g) at 25C and 1 atm with 1 mol O2(g) at the same temperature and pressure to produce liquid water at these conditions. If this reaction is run in a controlled way to generate work, what is the maximum useful work that can be obtained? How much entropy is produced in this case?arrow_forwardFor the reaction NO(g)+NO2(g)N2O3(g) , use tabulated thermodynamic data to calculate H and S. Then use those values to answer the following questions. (a) Is this reaction spontaneous at 25°C? Explain your answer. (b) If the reaction is not spontaneous at 25°C, will it become spontaneous at higher temperatures or lower temperatures? (c) To show that your prediction is accurate, choose a temperature that corresponds to your prediction in part (b) and calculate G . (Assume that both enthalpy and entropy are independent of temperature.)arrow_forwardA key component in many chemical engineering designs is the separation of mixtures of chemicals. (a) What happens to the entropy of the system when a chemical mixture is separated? (b) Are designs for chemical separation more likely to rely on spontaneous or nonspontaneous processes?arrow_forward
- For each process, predict whether entropy increases or decreases, and explain how you arrived at your prediction. 2 CO2(g) → 2 CO(g) + O2(g) NaCl(s) → NaCl(aq) MgCO3(s) → MgO(s) + CO2(g)arrow_forwardWhat is the second law of thermodynamics? For any process, there are four possible sign combinations for Ssys and Ssurr. Which sign combination(s) always give a spontaneous process? Which sign combination(s) always give a non-spontaneous process? Which sign combination(s) may or may not give a spontaneous process?arrow_forward
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