Chemistry: A Molecular Approach (4th Edition)
4th Edition
ISBN: 9780134112831
Author: Nivaldo J. Tro
Publisher: PEARSON
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Chapter 18, Problem 29E
Interpretation Introduction
Introduction: Entropy is a quantitative measure of randomness of a system, which increases with a number of energetically equivalent ways of positioning the components of a system in order to reach a particular state.
Mathematically, it is shown as
Here, k = Boltzmann constant and W is the number of energetically equivalent ways to arrange the components of the system. In other words, W is the number of possible microstates in a given macrostate.
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Use the expression below to
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round your answer).
⚫ calculate the % error (or % relative error or % inherent error)
⚫ calculate the absolute error.
(20.54±0.02 × 0.254±0.003) / (3.21±0.05) =
Value:
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Absolute error: ± |
% (only 1 significant digit)
(only 1 significant digit)
Chapter 18 Solutions
Chemistry: A Molecular Approach (4th Edition)
Ch. 18 - Prob. 1SAQCh. 18 - Prob. 2SAQCh. 18 - Q3. Arrange the gases—F2, Ar, and CH3F—in order of...Ch. 18 - Q4. Calculate the change in entropy that occurs in...Ch. 18 - Q5. A reaction has a ΔHrxn = 54.2 kJ. Calculate...Ch. 18 - Prob. 6SAQCh. 18 - Q7. Use standard entropies to calculate for the...Ch. 18 - Q8. Use standard free energies of formation to...Ch. 18 - Q9. Find ΔG$$ for the reaction 2 A + B → 2 C from...Ch. 18 - Prob. 10SAQ
Ch. 18 - Prob. 11SAQCh. 18 - Prob. 12SAQCh. 18 - Prob. 13SAQCh. 18 - Prob. 14SAQCh. 18 - Prob. 15SAQCh. 18 - Prob. 16SAQCh. 18 - 1. What is the first law of thermodynamics, and...Ch. 18 - Prob. 2ECh. 18 - 3. What is a perpetual motion machine? Can such a...Ch. 18 - 4. Is it more efficient to heat your home with a...Ch. 18 - 5. What is a spontaneous process? Provide an...Ch. 18 - Prob. 6ECh. 18 - Prob. 7ECh. 18 - Prob. 8ECh. 18 - Prob. 9ECh. 18 - Prob. 10ECh. 18 - Prob. 11ECh. 18 - Prob. 12ECh. 18 - Prob. 13ECh. 18 - Prob. 14ECh. 18 - Prob. 15ECh. 18 - 16. Predict the spontaneity of a reaction (and the...Ch. 18 - 17. State the third law of thermodynamics and...Ch. 18 - 18. Why is the standard entropy of a substance in...Ch. 18 - Prob. 19ECh. 18 - Prob. 20ECh. 18 - 21. What are three different methods to calculate...Ch. 18 - Prob. 22ECh. 18 - Prob. 23ECh. 18 - Prob. 24ECh. 18 - Prob. 25ECh. 18 - Prob. 26ECh. 18 - 27. Which of these processes is spontaneous?
a....Ch. 18 - 28. Which of these processes are nonspontaneous?...Ch. 18 - 29. Two systems, each composed of two particles...Ch. 18 - 30. Two systems, each composed of three particles...Ch. 18 - 31. Calculate the change in entropy that occurs in...Ch. 18 - 32. Calculate the change in entropy that occurs in...Ch. 18 - 33. Calculate the change in entropy that occurs in...Ch. 18 - 34. Calculate the change in entropy that occurs in...Ch. 18 - 35. Without doing any calculations, determine the...Ch. 18 - 36. Without doing any calculations, determine the...Ch. 18 - Prob. 37ECh. 18 - 38. Without doing any calculations, determine the...Ch. 18 - 39. Calculate ΔSsurr at the indicated temperature...Ch. 18 - Prob. 40ECh. 18 - 41. Given the values of ΔH$$, ΔS$$, and T,...Ch. 18 - Prob. 42ECh. 18 - 43. Calculate the change in Gibbs free energy for...Ch. 18 - 44. Calculate the change in Gibbs free energy for...Ch. 18 - 45. Calculate the free energy change for this...Ch. 18 - Prob. 46ECh. 18 - Prob. 47ECh. 18 - Prob. 48ECh. 18 - Prob. 49ECh. 18 - 50. What is the molar entropy of a pure crystal at...Ch. 18 - Prob. 51ECh. 18 - 52. For each pair of substances, choose the one...Ch. 18 - 53. Rank each set of substances in order of...Ch. 18 - 54. Rank each set of substances in order of...Ch. 18 - Prob. 55ECh. 18 - Prob. 56ECh. 18 - Prob. 57ECh. 18 - Prob. 58ECh. 18 - Prob. 59ECh. 18 - Prob. 60ECh. 18 - Prob. 61ECh. 18 - 62. For each reaction, calculate , , and at 25 °C...Ch. 18 - 63. Use standard free energies of formation to...Ch. 18 - 64. Use standard free energies of formation to...Ch. 18 - 65. Consider the reaction:
2 NO(g) + O2(g) → 2...Ch. 18 - Prob. 66ECh. 18 - 67. Determine ΔG° for the reaction:
Fe2O3(s) + 3...Ch. 18 - 68. Calculate for the reaction:
CaCO3(s) → CaO(s)...Ch. 18 - 69. Consider the sublimation of iodine at 25.0 °C...Ch. 18 - 70. Consider the evaporation of methanol at 25.0...Ch. 18 - 71. Consider the reaction:
CH3OH(g) CO(g) + 2...Ch. 18 - Prob. 72ECh. 18 - Prob. 73ECh. 18 - Prob. 74ECh. 18 - Prob. 75ECh. 18 - Prob. 76ECh. 18 - 77. Estimate the value of the equilibrium constant...Ch. 18 - 78. Estimate the value of the equilibrium constant...Ch. 18 - 79. Consider the reaction:
H2(g) + I2(g) 2...Ch. 18 - Prob. 80ECh. 18 - 81. The change in enthalpy () for a reaction is...Ch. 18 - Prob. 82ECh. 18 - 83. Determine the sign of ΔSsys for each...Ch. 18 - 84. Determine the sign of ΔSsys for each...Ch. 18 - 85. Our atmosphere is composed primarily of...Ch. 18 - Prob. 86ECh. 18 - 87. Ethene (C2H4) can be halogenated by the...Ch. 18 - 88. H2 reacts with the halogens (X2) according to...Ch. 18 - 89. Consider this reaction occurring at 298...Ch. 18 - 90. Consider this reaction occurring at 298...Ch. 18 - Prob. 91ECh. 18 - Prob. 92ECh. 18 - 93. These reactions are important in catalytic...Ch. 18 - Prob. 94ECh. 18 - Prob. 95ECh. 18 - Prob. 96ECh. 18 - 97. Consider the reaction X2(g) → 2 X(g). When a...Ch. 18 - 98. Dinitrogen tetroxide decomposes to nitrogen...Ch. 18 - 99. Indicate and explain the sign of ΔSuniv for...Ch. 18 - Prob. 100ECh. 18 - Prob. 101ECh. 18 - Prob. 102ECh. 18 - Prob. 103ECh. 18 - Prob. 104ECh. 18 - Prob. 105ECh. 18 - Prob. 106ECh. 18 - Prob. 107ECh. 18 - 108. The salt ammonium nitrate can follow three...Ch. 18 - 109. Given the data, calculate ΔSvap for each of...Ch. 18 - Prob. 110ECh. 18 - Prob. 111ECh. 18 - Prob. 112ECh. 18 - Prob. 113ECh. 18 - 114. Which statement is true?
a. A reaction in...Ch. 18 - Prob. 115ECh. 18 - Prob. 116ECh. 18 - Prob. 117ECh. 18 - Prob. 118QGWCh. 18 - Prob. 119QGWCh. 18 - 120. Not all processes in which the system...Ch. 18 - Prob. 121QGWCh. 18 - Prob. 122QGWCh. 18 - Prob. 123DIA
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