Chemistry: The Central Science (14th Edition)
14th Edition
ISBN: 9780134414232
Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus
Publisher: PEARSON
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Textbook Question
Chapter 19, Problem 109IE
The following data compare the standard enthalpies and free energies of formation of some crystalline ionic substances and aqueous solutions of the substances:
| Substance | ΔHOf (KJ / mol) | Δ GOf (KJ / mol) |
| AgNO3(s) | −124.4 | −33.4 |
| AgNO3(aq) | −101.7 | −34.2 |
| MgSO4(S) | −1283.7 | -1169.6 |
| MgSO4(aq) | −1374.8 | -1198.4 |
Write the formation reaction for AgNO3 (s). Based on this reaction, do you expect the entropy of the system to increase or decrease upon the formation of AgNO3 (s)?
(b) Use ΔHO f and ΔGO f of AgNO3 (S) to determine the entropy change upon formation of the substance. Is your answer consistent with your reasoning in part (a)?
(c ) Is dissolving AgNO3 in water an exothermic or endothermic process?
What about dissolving MgSO4 in water?
(d) For both AgNO3 and MgSO4, use the data to calculate the entropy change when the solid is dissolved in water.
(e) Discuss the results from part (d) with reference to material presented in this chapter and in the “A Closer Look” box on page 814.
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Chapter 19 Solutions
Chemistry: The Central Science (14th Edition)
Ch. 19.1 - The process of iron being oxidized to make iron...Ch. 19.1 - At 1 atm pressure, CO2(s) sublimes at 78oC. Is...Ch. 19.2 - Prob. 19.2.1PECh. 19.2 - Prob. 19.2.2PECh. 19.3 - Prob. 19.3.1PECh. 19.3 - Prob. 19.3.2PECh. 19.3 - Prob. 19.4.1PECh. 19.3 - Prob. 19.4.2PECh. 19.4 - Prob. 19.5.1PECh. 19.4 - Using the standard molar entropies in Appendix C,...
Ch. 19.5 - Which of these statements is true? All spontaneous...Ch. 19.5 - Prob. 19.6.2PECh. 19.5 - Prob. 19.7.1PECh. 19.5 - Prob. 19.7.2PECh. 19.5 - Prob. 19.8.1PECh. 19.5 - Prob. 19.8.2PECh. 19.6 - What is the temperature above which the Haber...Ch. 19.6 - Prob. 19.9.2PECh. 19.7 - Prob. 19.10.1PECh. 19.7 - Prob. 19.10.2PECh. 19.7 - Prob. 19.11.1PECh. 19.7 - Prob. 19.11.2PECh. 19.7 - Prob. 19.12.1PECh. 19.7 - Prob. 19.12.2PECh. 19 - Prob. 1DECh. 19 - Prob. 1ECh. 19 - As shown here, one type of computer keyboard...Ch. 19 - 19.3
a. What are the signs of ΔS and ΔH for the...Ch. 19 - Predict the signs of H and S for this reaction....Ch. 19 - The accompanying diagram shows how entropy varies...Ch. 19 - Prob. 6ECh. 19 - The accompanying diagram shows how H (red line)...Ch. 19 - Prob. 8ECh. 19 - Prob. 9ECh. 19 - Prob. 10ECh. 19 - Prob. 11ECh. 19 - Prob. 12ECh. 19 - Prob. 13ECh. 19 - Can endothermic chemical reaction be spontaneous?...Ch. 19 - Prob. 15ECh. 19 - Prob. 16ECh. 19 - Prob. 17ECh. 19 - Prob. 18ECh. 19 - Prob. 19ECh. 19 - Prob. 20ECh. 19 - Prob. 21ECh. 19 - Prob. 22ECh. 19 - Prob. 23ECh. 19 - Prob. 24ECh. 19 - Prob. 25ECh. 19 - Prob. 26ECh. 19 - Prob. 27ECh. 19 - Prob. 28ECh. 19 - Prob. 29ECh. 19 - Prob. 30ECh. 19 - Prob. 31ECh. 19 - Using the heat of vaporization in Appendix B,...Ch. 19 - Prob. 33ECh. 19 - Prob. 34ECh. 19 - Prob. 35ECh. 19 - Prob. 36ECh. 19 - Prob. 37ECh. 19 - Prob. 38ECh. 19 - For each of the following pairs, predict which...Ch. 19 - For each of the following pairs, predict which...Ch. 19 - Predict the sign of the entropy change of the...Ch. 19 - Prob. 42ECh. 19 - Prob. 43ECh. 19 - 19.44 Propanol (C3H7OH) melts at – 126.5 o C and...Ch. 19 - Prob. 45ECh. 19 - Prob. 46ECh. 19 - Prob. 47ECh. 19 - Prob. 48ECh. 19 - Prob. 49ECh. 19 - Prob. 50ECh. 19 - Using So values from Appendix C, calculate So...Ch. 19 - Calculate So values for the following reactions by...Ch. 19 - Prob. 53ECh. 19 - Prob. 54ECh. 19 - For a certain chemical reaction, Ho = -35.4 kJ and...Ch. 19 - A certain reaction has Ho = +23.7.kJ and So = +...Ch. 19 - Using data in Appendix C, calculate Ho, So, and Go...Ch. 19 - Prob. 58ECh. 19 - Prob. 59ECh. 19 - Prob. 60ECh. 19 - Prob. 61ECh. 19 - Prob. 62ECh. 19 - Prob. 63ECh. 19 - Prob. 64ECh. 19 - Prob. 65ECh. 19 - Prob. 66ECh. 19 - Prob. 67ECh. 19 - Prob. 68ECh. 19 - Prob. 69ECh. 19 - Prob. 70ECh. 19 - a. Use data in Appendix c to estimate the boiling...Ch. 19 - Prob. 72ECh. 19 - Prob. 73ECh. 19 - Prob. 74ECh. 19 - Prob. 75ECh. 19 - Prob. 76ECh. 19 - Prob. 77ECh. 19 - 19.78 Consider the reaction 3CH4(g) C3H8(g) ...Ch. 19 - Use data from Appendix C to calculate the...Ch. 19 - Prob. 80ECh. 19 - Prob. 81ECh. 19 - Prob. 82ECh. 19 - Prob. 83ECh. 19 - Prob. 84ECh. 19 - Prob. 85AECh. 19 - Prob. 86AECh. 19 - Prob. 87AECh. 19 - Prob. 88AECh. 19 - Prob. 89AECh. 19 - Prob. 90AECh. 19 - Prob. 91AECh. 19 - Prob. 92AECh. 19 - Prob. 93AECh. 19 - Prob. 94AECh. 19 - Prob. 95AECh. 19 - Prob. 96AECh. 19 - Prob. 97AECh. 19 - Prob. 98AECh. 19 - Prob. 99AECh. 19 - Prob. 100AECh. 19 - Prob. 101AECh. 19 - Prob. 102AECh. 19 - Most liquids follow Trouton’s rule (see Exercise...Ch. 19 - In chemical kinetics, the entropy of activation is...Ch. 19 - Prob. 105IECh. 19 - Prob. 106IECh. 19 - Prob. 107IECh. 19 - Prob. 108IECh. 19 - The following data compare the standard enthalpies...Ch. 19 - Prob. 110IECh. 19 - Prob. 111IECh. 19 - Prob. 112IE
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