MASTERING CHEMISTRY:THE CENTRAL SCIENCE
13th Edition
ISBN: 9781269712538
Author: Brown
Publisher: PEARSON
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Chapter 4, Problem 77E
As shown here, one type of computer keyboard cleaner contains liquefied 1, 1-difluoroethane (C2H4F2), which is a gas at atmospheric pressure. When the nozzle is squeezed, the 1, 1-difluroenthane vaporizes out of the nozzle at high pressure, blowing dust out objects.
- Based on your experience, is the vaporization a spontaneous process at room temperature?
- Defining the 1.1-difluoroethane as the system, do you expect qsys for the process to be positive or negative
- Predict whether ΔS is positive or negative for this process.
- Given your answer to (a), (b), and (c), do you think the operation of this product depends more on enthalpy or entropy? [Sections 19.1 and 19.2]
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Chapter 4 Solutions
MASTERING CHEMISTRY:THE CENTRAL SCIENCE
Ch. 4.1 - Prob. 4.1.1PECh. 4.1 - How are the boundaries between the regions of the...Ch. 4.2 - Air pollution in the Mexico City metropolitan area...Ch. 4.2 - Prob. 4.2.2PECh. 4.2 - Prob. 4.3.1PECh. 4.2 - Prob. 4.3.2PECh. 4.2 - Prob. 4.4.1PECh. 4.2 - Prob. 4.4.2PECh. 4.3 - Distinguish between photodissociation and...Ch. 4.3 - Prob. 4.5.2PE
Ch. 4.3 - Prob. 4.6.1PECh. 4.3 - Prob. 4.6.2PECh. 4.3 - Do the reactions involved in ozone depletion...Ch. 4.3 - Prob. 4.7.2PECh. 4.4 - Prob. 4.8.1PECh. 4.4 - Prob. 4.8.2PECh. 4.4 - Prob. 4.9.1PECh. 4.4 - Prob. 4.9.2PECh. 4.4 - Prob. 4.10.1PECh. 4.4 - Prob. 4.10.2PECh. 4.5 - Practice Exercise 2 The bond energy in N2 is 941...Ch. 4.5 - Prob. 4.11.2PECh. 4.5 - Prob. 4.12.1PECh. 4.5 - Prob. 4.12.2PECh. 4.5 - Prob. 4.13.1PECh. 4.5 - Prob. 4.13.2PECh. 4.5 - The figure shows the three lowest regions of...Ch. 4.5 - Prob. 4.14.2PECh. 4.6 - Where does the energy come from to evaporate the...Ch. 4.6 - Prob. 4.15.2PECh. 4.6 - Prob. 4.16.1PECh. 4.6 - The first stage of treatment at the reverse...Ch. 4.6 - Prob. 4.17.1PECh. 4.6 - Prob. 4.17.2PECh. 4 - Prob. 1DECh. 4 - Prob. 1ECh. 4 - Prob. 2ECh. 4 - Prob. 3ECh. 4 - Prob. 4ECh. 4 - Prob. 5ECh. 4 - Prob. 6ECh. 4 - Which of the following ions will always be a...Ch. 4 - Prob. 8ECh. 4 - Prob. 9ECh. 4 - Prob. 10ECh. 4 - Prob. 11ECh. 4 - List the common products formed when an organic...Ch. 4 - Prob. 13ECh. 4 - Prob. 14ECh. 4 - Prob. 15ECh. 4 - Prob. 16ECh. 4 - Prob. 17ECh. 4 - Prob. 18ECh. 4 - Prob. 19ECh. 4 - Prob. 20ECh. 4 - Prob. 21ECh. 4 - Prob. 22ECh. 4 - Prob. 23ECh. 4 - Prob. 24ECh. 4 - Prob. 25ECh. 4 - Prob. 26ECh. 4 - Prob. 27ECh. 4 - Prob. 28ECh. 4 - Prob. 29ECh. 4 - Explain, using Le Châtelier’s principle, why the...Ch. 4 - Prob. 31ECh. 4 - Prob. 32ECh. 4 - Prob. 33ECh. 4 - Prob. 34ECh. 4 - Prob. 35ECh. 4 - Prob. 36ECh. 4 - Prob. 37ECh. 4 - Prob. 38ECh. 4 - Prob. 39ECh. 4 - Prob. 40ECh. 4 - Prob. 41ECh. 4 - Prob. 42ECh. 4 - Prob. 43ECh. 4 - Prob. 44ECh. 4 - Prob. 45ECh. 4 - 18.85 The main reason that distillation is a...Ch. 4 - Prob. 47ECh. 4 - Prob. 48ECh. 4 - Prob. 49ECh. 4 - Prob. 50ECh. 4 - Prob. 51ECh. 4 - Prob. 52ECh. 4 - The process of iron being oxidized to make iron...Ch. 4 - At 1 atm pressure, CO2(s) sublimes at 78oC. Is...Ch. 4 - Prob. 55ECh. 4 - Prob. 56ECh. 4 - Prob. 57ECh. 4 - Prob. 58ECh. 4 - Prob. 59ECh. 4 - Prob. 60ECh. 4 - Using the standard molar entropies in Appendix C,...Ch. 4 - Which of these statements is true? All spontaneous...Ch. 4 - Prob. 63ECh. 4 - Prob. 64ECh. 4 - Prob. 65ECh. 4 - Prob. 66ECh. 4 - Prob. 67ECh. 4 - What is the temperature above which the Haber...Ch. 4 - Prob. 69ECh. 4 - Prob. 70ECh. 4 - Prob. 71ECh. 4 - Prob. 72ECh. 4 - Prob. 73ECh. 4 - Prob. 74ECh. 4 - Prob. 75ECh. 4 - Prob. 76ECh. 4 - As shown here, one type of computer keyboard...Ch. 4 - 19.3
a. What are the signs of ΔS and ΔH for the...Ch. 4 - Predict the signs of H and S for this reaction....Ch. 4 - Prob. 80ECh. 4 - The accompanying diagram shows how H (red line)...Ch. 4 - Prob. 82ECh. 4 - Prob. 83ECh. 4 - Prob. 84ECh. 4 - Prob. 85ECh. 4 - Prob. 86ECh. 4 - Prob. 87ECh. 4 - Can endothermic chemical reaction be spontaneous?...Ch. 4 - Prob. 89ECh. 4 - Prob. 90ECh. 4 - Prob. 91AECh. 4 - Prob. 92AECh. 4 - Prob. 93AECh. 4 - Prob. 94AECh. 4 - Prob. 95AECh. 4 - Prob. 96AECh. 4 - Prob. 97AECh. 4 - Prob. 98AECh. 4 - Prob. 99AECh. 4 - Prob. 100AECh. 4 - Prob. 101AECh. 4 - Prob. 102AECh. 4 - Prob. 103AECh. 4 - Alcohol-based fuels for automobiles lead to the...Ch. 4 - Prob. 105IECh. 4 - Prob. 106IECh. 4 - Prob. 107IECh. 4 - Prob. 108IECh. 4 - Prob. 109IECh. 4 - Prob. 110IECh. 4 - Prob. 111IECh. 4 - Prob. 112IECh. 4 - Although there are many ions in seawater, the...Ch. 4 - The Ogallala aquifer described in the Close Look...Ch. 4 - Prob. 115IE
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