CHEMISTRY THE CENTRAL SCIENCE >EBOOK<
14th Edition
ISBN: 9780136873891
Author: Brown
Publisher: PEARSON
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Chapter 18, Problem 33E
Alcohol-based fuels for automobiles lead to the production of formaldehyde (CH2O) in exhaust gases. Formaldehyde undergoes photodissociation, which contributes to photochemical smog:
CH2O + hv → CHO + H
The maximum
- In what part of the
electromagnetic spectrum is light with this wavelength found? - What is the maximum strength of a bond, in kJ/mol, that can be broken by absorption of a photon of 335-nm light?
- Compare you answer from part (b) to the appropriate value from Table 8.3. What do you conclude about C-H bond energy in formaldehyde?
- Write out the formaldehyde photodissociation reaction, showing Lewis-dot structures.
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The breaking of the O-O bond in peroxydisulfuryl
difluoride (FO,SOOSO,F) gives FO,SO:
(FO2SO)2 2 2 FO2SO
The compound on the left of this equation is a colorless
liquid that boils at 67.1°C. Its vapor, when heated to
about 100°C, turns brown as the product of the reaction
forms. Suppose that, in a sample of the vapor, the intensity
of the brown color doubles between 100°C and 110°C
and that the total pressure increases only by the 2.7%
predicted for an ideal gas. Estimate AH° for the preceding
reaction.
234
CHAPTER 8
23. Using the following thermochemical equations:
2 SO,(g) → 2 SO,(g) + O,(g)
ΔΗ
TXn 1
= +198 kJ/molm
So;(g) + H,0(g) → H,SO,(e)
ΔΗ
Ixn 2
=-176 kJ/molm
Determine the enthalpy of the reaction represented below:
SO,(g) +0,(g) + H,O(g) → H,SO,(€) AH°,
= ?
Txn 3
= +22 kJ/molxn
=-77 kJ/mol,pn
=-275 kJ/molxn
(А) ДНО
KOH)
Ixn
(B) ДНе
(C) AHÓ
(D) AH°,
Ixn
=-374 kJ/molxn
calculate the reaction energy of the following reactions and then determine if they are endothermic or exothermic:
2F2(g) + 2H2O => 4HF + O2
Chapter 18 Solutions
CHEMISTRY THE CENTRAL SCIENCE >EBOOK<
Ch. 18.1 - Prob. 18.1.1PECh. 18.1 - Prob. 18.1.2PECh. 18.1 - Prob. 18.2.1PECh. 18.1 - Practice Exercise 2 The bond energy in N2 is 941...Ch. 18.2 - Prob. 18.3.1PECh. 18.2 - Prob. 18.3.2PECh. 18 - Prob. 1DECh. 18 - Prob. 1ECh. 18 - Prob. 2ECh. 18 - The figure shows the three lowest regions of...
Ch. 18 - Prob. 4ECh. 18 - Where does the energy come from to evaporate the...Ch. 18 - Prob. 6ECh. 18 - Prob. 7ECh. 18 - The first stage of treatment at the reverse...Ch. 18 - Prob. 9ECh. 18 - Prob. 10ECh. 18 - Prob. 11ECh. 18 - How are the boundaries between the regions of the...Ch. 18 - Air pollution in the Mexico City metropolitan area...Ch. 18 - Prob. 14ECh. 18 - Prob. 15ECh. 18 - Prob. 16ECh. 18 - Prob. 17ECh. 18 - Prob. 18ECh. 18 - Distinguish between photodissociation and...Ch. 18 - Prob. 20ECh. 18 - Prob. 21ECh. 18 - Prob. 22ECh. 18 - Do the reactions involved in ozone depletion...Ch. 18 - Prob. 24ECh. 18 - Prob. 25ECh. 18 - Prob. 26ECh. 18 - Prob. 27ECh. 18 - Prob. 28ECh. 18 - Prob. 29ECh. 18 - Prob. 30ECh. 18 - Prob. 31ECh. 18 - Prob. 32ECh. 18 - Alcohol-based fuels for automobiles lead to the...Ch. 18 - Prob. 34ECh. 18 - Prob. 35ECh. 18 - Prob. 36ECh. 18 - Prob. 37ECh. 18 - Prob. 38ECh. 18 - Prob. 39ECh. 18 - Prob. 40ECh. 18 - Prob. 41ECh. 18 - Prob. 42ECh. 18 - Although there are many ions in seawater, the...Ch. 18 - The Ogallala aquifer described in the Close Look...Ch. 18 - Prob. 45ECh. 18 - Prob. 46ECh. 18 - List the common products formed when an organic...Ch. 18 - Prob. 48ECh. 18 - Prob. 49ECh. 18 - Prob. 50ECh. 18 - Prob. 51ECh. 18 - Prob. 52ECh. 18 - Prob. 53ECh. 18 - Prob. 54ECh. 18 - Prob. 55ECh. 18 - Prob. 56ECh. 18 - Prob. 57ECh. 18 - Prob. 58ECh. 18 - Prob. 59ECh. 18 - Prob. 60ECh. 18 - Prob. 61AECh. 18 - Prob. 62AECh. 18 - Prob. 63AECh. 18 - Prob. 64AECh. 18 - Prob. 65AECh. 18 - Prob. 66AECh. 18 - Prob. 67AECh. 18 - Explain, using Le Châtelier’s principle, why the...Ch. 18 - Prob. 69AECh. 18 - Prob. 70AECh. 18 - Prob. 71AECh. 18 - Prob. 72AECh. 18 - Prob. 73AECh. 18 - Prob. 74AECh. 18 - Prob. 75AECh. 18 - Prob. 76AECh. 18 - Prob. 77AECh. 18 - Prob. 78IECh. 18 - Prob. 79IECh. 18 - Prob. 80IECh. 18 - Prob. 81IECh. 18 - Prob. 82IECh. 18 - Prob. 83IECh. 18 - Prob. 84IECh. 18 - 18.85 The main reason that distillation is a...Ch. 18 - Prob. 86IECh. 18 - Prob. 87IECh. 18 - Prob. 88IECh. 18 - Prob. 89IECh. 18 - Prob. 90IECh. 18 - Prob. 91IECh. 18 - Prob. 92IE
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