LCPO CHEMISTRY W/MODIFIED MASTERING
8th Edition
ISBN: 9780135214756
Author: Robinson
Publisher: PEARSON
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Textbook Question
Chapter 18, Problem 18.70SP
Give an equation that relates the entropy change in the
(a) An exothermic reaction
(b) An endothermic reaction
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Students have asked these similar questions
Wintergreen from Aspirin:
1. In isolating the salicylic acid, why is it important to press out as much of the water as possible?
2. Write the mechanism of the esterification reaction you did.
3.
What characteristic absorption band changes would you expect in the IR spectrum on going from aspirin to salicyclic acid and
then to methyl salicylate as you did in the experiment today? Give approximate wavenumbers associated with each functional
group change.
What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What
other impurities are present in your product and how do you know?
Synthesis of ZybanⓇ:
1. Write a mechanism for the bromination of m-chloropropiophenone.
Br₂
CH2Cl2
Cl
Br
2. Give the expected m/z (to a round number) for the molecular ion from the product above (including isotopic peaks).
3. What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What
other impurities are present in your product and how do you know?
Synthesis of Ibuprofen-Part 2:
1. Some pain relievers including ibuprofen (MotrinⓇ) and naproxen (Aleve®) are "α-arylpropanoic acids." Look up the structure
of naproxen (AleveⓇ), another a-arylpropionic acid. Using the same reactions that we used for making ibuprofen, show how
to make naproxen from the compound below. Show all intermediates and reagents in your synthesis.
Show how you would prepare ibuprofen starting from p-isobutylbenzene rather than p-isobutylacetophenenone. What reaction
steps would need to change/add?
3. What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What
other impurities are present in your product and how do you know?
Chapter 18 Solutions
LCPO CHEMISTRY W/MODIFIED MASTERING
Ch. 18 - Which of the following reactions has a decrease in...Ch. 18 - CONCEPTUAL APPLY 18.2 Consider the gas-phase...Ch. 18 - Consider the distribution of ideal gas molec ules...Ch. 18 - (a) Which state has the higher entropy? Explain in...Ch. 18 - Calculate the standard entropy of reaction for...Ch. 18 - The unbalanced reaction for the combustion of...Ch. 18 - Calculate the value of Stotal, and decide whether...Ch. 18 - Use the values of Hof, and So in Appendix B to...Ch. 18 - Consider the decomposition of gaseous N2O4:...Ch. 18 - Prob. 18.10A
Ch. 18 - Consider the thermal decomposition of calcium...Ch. 18 - Consider the following endothermic decomposition...Ch. 18 - Prob. 18.13PCh. 18 - (a) Using values of Gof in Table 18.3, calculate...Ch. 18 - Prob. 18.15PCh. 18 - Consider the following gas-phase reaction of A2...Ch. 18 - Prob. 18.17PCh. 18 - Prob. 18.18ACh. 18 - Prob. 18.19PCh. 18 - Prob. 18.20ACh. 18 - Two complementary strands of DNA arey placed in...Ch. 18 - Prob. 18.22PCh. 18 - Prob. 18.23PCh. 18 - Prob. 18.24PCh. 18 - Prob. 18.25PCh. 18 - 17.28 Consider the gas-phase reaction of AB3 and...Ch. 18 - 17.29 Ideal gases A (red spheres) and B (blue...Ch. 18 - What are the signs (+, —, or 0) of H, S, and G...Ch. 18 - Prob. 18.29CPCh. 18 - Prob. 18.30CPCh. 18 - 17.33 Consider the following spontaneous reaction...Ch. 18 - Prob. 18.32CPCh. 18 - Consider again the dissociation reaction A2g 2...Ch. 18 - Prob. 18.34CPCh. 18 - Prob. 18.35CPCh. 18 - Prob. 18.36CPCh. 18 - Prob. 18.37CPCh. 18 - Which of the following processes are spontaneous,...Ch. 18 - Prob. 18.39SPCh. 18 - Assuming that gaseous reactants and products are...Ch. 18 - Prob. 18.41SPCh. 18 - Prob. 18.42SPCh. 18 - Prob. 18.43SPCh. 18 - 17.46 Predict the sign of the entropy change in...Ch. 18 - Predict the sign of S in the system for each of...Ch. 18 - Prob. 18.46SPCh. 18 - Prob. 18.47SPCh. 18 - Prob. 18.48SPCh. 18 - Consider a disordered crystal of...Ch. 18 - Prob. 18.50SPCh. 18 - Prob. 18.51SPCh. 18 - Prob. 18.52SPCh. 18 - Prob. 18.53SPCh. 18 - Prob. 18.54SPCh. 18 - Prob. 18.55SPCh. 18 - Which state in each of the following pairs has the...Ch. 18 - Prob. 18.57SPCh. 18 - What is the entropy change when the volume of 1.6...Ch. 18 - Prob. 18.59SPCh. 18 - Prob. 18.60SPCh. 18 - Prob. 18.61SPCh. 18 - Prob. 18.62SPCh. 18 - Prob. 18.63SPCh. 18 - Use the standard molar entropies in Appendix B to...Ch. 18 - Prob. 18.65SPCh. 18 - Use the standard molar entropies in Appendix B to...Ch. 18 - Use the So values in Appendix B to calculate So at...Ch. 18 - Prob. 18.68SPCh. 18 - An isolated system is one that exchanges neither...Ch. 18 - Give an equation that relates the entropy change...Ch. 18 - Prob. 18.71SPCh. 18 - Reduction of mercury (II) oxide with zinc gives...Ch. 18 - Elemtal sulfur is formed by the reaction of zinc...Ch. 18 - In lightning storms, oxygen is converted to ozone:...Ch. 18 - Sulfur dioxide emitted from coal-fired power...Ch. 18 - Elemental mercury can be produced from its oxide:...Ch. 18 - Phosphorus pentachloride forms from phosphorus...Ch. 18 - For the vaporizatio of benzene, Hvap=30.7kJ/mol...Ch. 18 - Prob. 18.79SPCh. 18 - Prob. 18.80SPCh. 18 - Prob. 18.81SPCh. 18 - Prob. 18.82SPCh. 18 - Which of the following reactions will be...Ch. 18 - Prob. 18.84SPCh. 18 - Consider a twofold expansion of 1 mol of an ideal...Ch. 18 - Prob. 18.86SPCh. 18 - Prob. 18.87SPCh. 18 - Calculate the melting point of benzoic acid...Ch. 18 - Calculate the enthalpy of fusion of naphthalene...Ch. 18 - Prob. 18.90SPCh. 18 - Chloroform (CHCI3) has a normal boiling point of...Ch. 18 - Prob. 18.92SPCh. 18 - Prob. 18.93SPCh. 18 - Use the data in Appendix B to calculate Ho and So...Ch. 18 - Use the data in Appendix B to calculate Ho and So...Ch. 18 - Use the standard free energies of formation in...Ch. 18 - Prob. 18.97SPCh. 18 - Prob. 18.98SPCh. 18 - Prob. 18.99SPCh. 18 - Use the values of in Appendix B to calculate the...Ch. 18 - Prob. 18.101SPCh. 18 - Ethanol is manufactured in indsutry by the...Ch. 18 - Prob. 18.103SPCh. 18 - Prob. 18.104SPCh. 18 - Prob. 18.105SPCh. 18 - Prob. 18.106SPCh. 18 - Prob. 18.107SPCh. 18 - Use the data in Appendix B to calculate .G for the...Ch. 18 - Prob. 18.109SPCh. 18 - Sulfuric acid is produced in larger amounts by...Ch. 18 - Urea (NH2CONH2) , an important nitrogen...Ch. 18 - What is the relationship between the standard...Ch. 18 - Prob. 18.113SPCh. 18 - Given values of Gof at 25 °C for liquid ethanol...Ch. 18 - Prob. 18.115SPCh. 18 - If Gof for gaseous bromine is 3.14 kJ/mol at 25oC,...Ch. 18 - Prob. 18.117SPCh. 18 - Ethylene oxide, C2H4O, is used to make antifreeze...Ch. 18 - The first step in the commerical producton of...Ch. 18 - Ammonium nitrate is dangerous because it...Ch. 18 - Prob. 18.121SPCh. 18 - Prob. 18.122SPCh. 18 - Prob. 18.123SPCh. 18 - Consider the Haber synthesis of gaseous...Ch. 18 - Prob. 18.125SPCh. 18 - Prob. 18.126MPCh. 18 - Prob. 18.127MPCh. 18 - Prob. 18.128MPCh. 18 - Prob. 18.129MPCh. 18 - Prob. 18.130MPCh. 18 - Prob. 18.131MPCh. 18 - A humiditysensor consists of a cardboard square...Ch. 18 - Prob. 18.133MPCh. 18 - Prob. 18.134MPCh. 18 - Prob. 18.135MPCh. 18 - Prob. 18.136MPCh. 18 - Prob. 18.137MPCh. 18 - Prob. 18.138MPCh. 18 - Prob. 18.139MPCh. 18 - Prob. 18.140MPCh. 18 - Prob. 18.141MPCh. 18 - Prob. 18.142MP
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