Chemistry: The Central Science, Books a la Carte Plus MasteringChemistry with eText -- Access Card Package (13th Edition)
13th Edition
ISBN: 9780321934826
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 20, Problem 74E
Energy bands are considered continuous due to the large number of closely spaced energy levels. The range of energy levels in a crystal of copper is approximately 1 X 10−−19J. Assuming equal spacing between levels, the spacing between energy levels may be approximated by dividing the range of energies by the number of atoms in the crystal.
a. How many copper atoms are in a piece of copper metal in the shape of a cube with edge length 0.5 mm? The density of copper is 8.96 g/cm3.
b. Determine the average spacing in J between energy levels in the copper metal in part (a).
c. Is this spacing larger, substantially smaller, or about the same as the 1 X 10−−18 J separation between energy levels in a hydrogen atom?
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The table includes macrostates characterized by 4 energy levels (&) that are
equally spaced but with different degrees of occupation.
a) Calculate the energy of all the macrostates (in joules). See if they all have
the same energy and number of particles.
b) Calculate the macrostate that is most likely to exist. For this macrostate,
show that the population of the levels is consistent with the Boltzmann
distribution.
macrostate 1 macrostate 2 macrostate 3
ε/k (K) Populations
Populations
Populations
300
5
3
4
200
7
9
8
100
15
17
16
0
33
31
32
DATO: k = 1,38×10-23 J K-1
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In an experiment, the viscosity of water was measured at different
temperatures and the table was constructed from the data obtained.
a) Calculate the activation energy of viscous flow (kJ/mol).
b) Calculate the viscosity at 30°C.
T/°C
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20
40
60
80
η/cpoise 1,972 1,005 0,656 0,469 0,356
Chapter 20 Solutions
Chemistry: The Central Science, Books a la Carte Plus MasteringChemistry with eText -- Access Card Package (13th Edition)
Ch. 20.1 - What is the reducing agent in the following...Ch. 20.1 - Prob. 20.1.2PECh. 20.2 - Prob. 20.2.1PECh. 20.2 - Prob. 20.2.2PECh. 20.2 - Prob. 20.3.1PECh. 20.2 - Prob. 20.3.2PECh. 20.3 - 12.11 Covalent bonding occurs in both molecular...Ch. 20.3 - Prob. 20.4.2PECh. 20.4 - 12.13 What kinds of attractive forces exist...Ch. 20.4 - Prob. 20.5.2PE
Ch. 20.4 - Prob. 20.6.1PECh. 20.4 - Prob. 20.6.2PECh. 20.4 - Prob. 20.7.1PECh. 20.4 - Prob. 20.7.2PECh. 20.4 - Prob. 20.8.1PECh. 20.4 - Amorphous silica, SiO2, has a density of about...Ch. 20.5 - Two patterns of packing for two different circles...Ch. 20.5 - Prob. 20.9.2PECh. 20.5 - Prob. 20.10.1PECh. 20.5 - Prob. 20.10.2PECh. 20.6 - Prob. 20.11.1PECh. 20.6 - Prob. 20.11.2PECh. 20.6 - Prob. 20.12.1PECh. 20.6 - Prob. 20.12.2PECh. 20.6 - Prob. 20.13.1PECh. 20.6 - Prob. 20.13.2PECh. 20.9 - Prob. 20.14.1PECh. 20.9 - Prob. 20.14.2PECh. 20 - 12.53 Which would you expect to be the more...Ch. 20 - 12.54 Which of the following statements does not...Ch. 20 - Prob. 2ECh. 20 - Prob. 3ECh. 20 - Prob. 4ECh. 20 - Prob. 5ECh. 20 - Prob. 6ECh. 20 - Prob. 7ECh. 20 - Prob. 8ECh. 20 - Prob. 9ECh. 20 - Prob. 10ECh. 20 - Prob. 11ECh. 20 - Prob. 12ECh. 20 - Prob. 13ECh. 20 - Prob. 14ECh. 20 - Prob. 15ECh. 20 - Prob. 16ECh. 20 - Prob. 17ECh. 20 - Prob. 18ECh. 20 - Prob. 19ECh. 20 - Prob. 20ECh. 20 - Prob. 21ECh. 20 - Prob. 22ECh. 20 - Prob. 23ECh. 20 - Prob. 24ECh. 20 - Prob. 25ECh. 20 - 12.61 A particular form of cinnabar (HgS) adopts...Ch. 20 - Prob. 27ECh. 20 - Prob. 28ECh. 20 - Prob. 29ECh. 20 - Prob. 30ECh. 20 - (a) What does the term electromotive force mean?...Ch. 20 - Prob. 32ECh. 20 - Prob. 33ECh. 20 - Prob. 34ECh. 20 - Prob. 35ECh. 20 - Prob. 36ECh. 20 - Prob. 37ECh. 20 - Prob. 38ECh. 20 - Prob. 39ECh. 20 - Prob. 40ECh. 20 - Prob. 41ECh. 20 - Prob. 42ECh. 20 - Prob. 43ECh. 20 - Prob. 44ECh. 20 - Prob. 45ECh. 20 - Prob. 46ECh. 20 - Prob. 47ECh. 20 - Prob. 48ECh. 20 - 12.86 Write a balanced chemical equation for the...Ch. 20 - Prob. 50ECh. 20 - Prob. 51ECh. 20 - Prob. 52ECh. 20 - Prob. 53ECh. 20 - Prob. 54ECh. 20 - Prob. 55ECh. 20 - Prob. 56ECh. 20 - Explain why “bands” may not be the most accurate...Ch. 20 - Prob. 58ECh. 20 - Prob. 59ECh. 20 - Prob. 60ECh. 20 - An ideal quantum dot for use in TVs does not...Ch. 20 - Prob. 62ECh. 20 - Prob. 63ECh. 20 - Prob. 64ECh. 20 - Prob. 65ECh. 20 - Prob. 66ECh. 20 - Pure iron crystallizes in a body-centered cubic...Ch. 20 - Prob. 68ECh. 20 - Prob. 69ECh. 20 - What type of latticeprimitive cubic, body-centered...Ch. 20 - Prob. 71ECh. 20 - Prob. 72ECh. 20 - Prob. 73ECh. 20 - Energy bands are considered continuous due to the...Ch. 20 - Prob. 75ECh. 20 - Prob. 76ECh. 20 - Prob. 77ECh. 20 - Prob. 78ECh. 20 - Prob. 79ECh. 20 - Prob. 80ECh. 20 - Prob. 81ECh. 20 - Prob. 82ECh. 20 - The karat scale used to describe gold alloys is...Ch. 20 - 12.125 Spinel is a mineral that contains 37.9% AI,...Ch. 20 - Prob. 85ECh. 20 - Prob. 86ECh. 20 - Prob. 87ECh. 20 - A plumber’s handbook states that you should not...Ch. 20 - Silicon has the diamond structure with a unit cell...Ch. 20 - Prob. 90ECh. 20 - Prob. 91ECh. 20 - Prob. 92ECh. 20 - Prob. 93ECh. 20 - Prob. 94ECh. 20 - Prob. 95ECh. 20 - Prob. 96ECh. 20 - Prob. 97AECh. 20 - Prob. 98AECh. 20 - Prob. 99AECh. 20 - Prob. 100AECh. 20 - Prob. 101AECh. 20 - Which of the three-dimensional primitive lattices...Ch. 20 - Prob. 103AECh. 20 - 12.27 What is the minimum number of atoms that...Ch. 20 - 12.28 What is the minimum number of atoms that...Ch. 20 - Prob. 106AECh. 20 - Prob. 107AECh. 20 - Prob. 108AECh. 20 - Prob. 109AECh. 20 - Prob. 110AECh. 20 - Prob. 111IECh. 20 - Prob. 112IECh. 20 - Prob. 113IECh. 20 - Prob. 114IECh. 20 - Prob. 115IECh. 20 - Prob. 116IECh. 20 - Prob. 117IECh. 20 - Prob. 118IECh. 20 - Prob. 119IE
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