EP ORGANIC CHEMISTRY -MOD.MASTERING 18W
9th Edition
ISBN: 9780136781776
Author: Wade
Publisher: PEARSON CO
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Chapter 4.7, Problem 4.10P
- a. Using bond-dissociation enthalpies from Table4-2 (page 167), calculate the heat of reaction for each step in the free-radical bromination of methane.
- b. Calculate the overall heat of reaction.
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7. Estimate the enthalpy of reaction (in kJ/mol) for the combustion of methane. Be sure to
show a lewis structure for each molecule.
CH, (g) + 20, (g)
·CO, (g) + H,O (g)
Bond Bond Enthalpy
(kJ/mol)
C-O
351
C=0
799
CEO
1070
O-O
142
O=0
498
C-H
414
O-H
460
A.) What is the heat of reaction, ΔH°?
CO2(g) + H2O(l) à H2CO3(aq)
–20.2 kJ mol–1
–1379 kJ mol–1
–592 kJ mol–1
B.)
What is the average bond energy in CO2?
CO2(g) ΔH°f, = –393.5 kJ mol–1
CO(g) ΔH°f, = –110.5 kJ mol–1
C(g) ΔH°f, = +715 kJ mol–1
CO32–(aq) ΔH°f, = –676.3 kJ mol–1
O(g) ΔH°f, = +249.0 kJ mol–1
207 kJ mol–1
1607 kJ mol–1
804 kJ mol–1
Use the indicated average bond enthalpies to estimate the change in enthalpy, ΔHo, for the reaction between methane and iodine to produce iodomethane and hydrogen iodide:
CH4(g) + I2(g) → CH3I(g) + HI(g) ΔHo = ?
It may be helpful to draw the Lewis electron dot structure for each reactant and product; all reactants and products have single bonds.
average bond enthalpies (kJ)
C - H 413 , C - I 240 , H - I 299 , I - I 151
Express your answer in units of kilojoules, but do not include the units on your submitted answer.
Chapter 4 Solutions
EP ORGANIC CHEMISTRY -MOD.MASTERING 18W
Ch. 4.3A - Draw Lewis structures for the following free...Ch. 4.3B - a. Write the propagation steps leading to the...Ch. 4.3C - Prob. 4.3PCh. 4.3C - Prob. 4.4PCh. 4.4 - The following reaction has a value of G =...Ch. 4.4 - Under base-catalyzed conditions two molecules of...Ch. 4.5B - When ethene is mixed with hydrogen in the presence...Ch. 4.5B - For each reaction, estimate whether S for the...Ch. 4.7 - a. Propose a mechanism for the free radical...Ch. 4.7 - a. Using bond-dissociation enthalpies from...
Ch. 4.8 - The reaction of tert-butyl chloride with methanol...Ch. 4.8 - Under certain conditions, the bromination of...Ch. 4.8 - When a small piece of plat num is added to a...Ch. 4.10 - Prob. 4.14PCh. 4.10 - Prob. 4.15PCh. 4.12 - The bromination of methane proceeds through the...Ch. 4.12 - a. Using me BDEs in Table4-2 (page 167 ), compute...Ch. 4.13A - What would be the product ratio in the...Ch. 4.13A - Classify each hydrogen atom in the following...Ch. 4.13B - Use the bond-dissociation enthalpies in Tabte4-2...Ch. 4.13B - Prob. 4.21PCh. 4.13B - Prob. 4.22PCh. 4.14 - a. Compute the heats of reaction for abstraction...Ch. 4.14 - 2,3-Dimethylbutane reacts with bromine in the...Ch. 4.14 - Prob. 4.25PCh. 4.15 - Prob. 4.26PCh. 4.15 - Prob. 4.27PCh. 4.16A - Prob. 4.28PCh. 4.16A - Prob. 4.29PCh. 4.16B - Prob. 4.30PCh. 4.16C - Prob. 4.31PCh. 4.16C - Acetonitrile (CH3C N) is deprotonated by very...Ch. 4.16D - Prob. 4.33PCh. 4 - The following reaction is a common synthesis used...Ch. 4 - Consider the following reaction-energy diagram. a....Ch. 4 - Draw a reaction-energy diagram for a one-step...Ch. 4 - Draw a reaction-energy diagram for a two-step...Ch. 4 - Prob. 4.38SPCh. 4 - Treatment of tert-butyl alcohol with concentrated...Ch. 4 - Label each hydrogen atom in the following...Ch. 4 - Prob. 4.41SPCh. 4 - Prob. 4.42SPCh. 4 - Prob. 4.43SPCh. 4 - Prob. 4.44SPCh. 4 - Prob. 4.45SPCh. 4 - Prob. 4.46SPCh. 4 - For each compound, predict the major product of...Ch. 4 - When exactly 1 mole of methane is mixed with...Ch. 4 - Prob. 4.49SPCh. 4 - Prob. 4.50SPCh. 4 - Prob. 4.51SPCh. 4 - When dichloromethane is treated with strong NaOH,...Ch. 4 - Prob. 4.53SPCh. 4 - When a small amount of iodine is added to a...Ch. 4 - Prob. 4.55SPCh. 4 - When healthy, Earths stratosphere contains a low...Ch. 4 - Prob. 4.57SPCh. 4 - lodination of alkanes using iodine (I2) is usually...
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