ismchapter10edition4 - Chapter 10 ! Solid State Physics...

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227 Chapter 10 ! Solid State Physics 10-1. The molar volume is 10-2. The molar volume is 10-3. 10-4. (a)
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Chapter 10 ! Solid State Physics 228 ( Problem 10-4 continued ) (b) (c) 10-5. Cohesive energy (LiBr) = This is about 32% larger than the value in Table 10-1. 10-6. (a) The cubic unit cell has side a = 2R ; therefore the volume of the unit cell is: V cell = a 3 = (2R) 3 = 8R 3 (b) The volume of the cell occupied by spheres (called the "packing fraction") is: Because 1/8 of the volume of each sphere is within the cell and there are eight corners.
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Chapter 10 ! Solid State Physics 229 10-7. (a) Cohesive Energy (eV) Melting point, K (b) Noting that the melting points are in kelvins on the graph, Co melting point = 1768 K, cohesive energy = 5.15 eV Ag melting point = 1235 K, cohesive energy = 3.65 eV Na melting point = 371 K, cohesive energy = 1.25 eV 10-8. The quantity in parentheses is the Madelung constant " . The 35th term of the series (2/35) is approximately 1% of the total, where " = 4.18. 10-9. (a)
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Chapter 10 ! Solid State Physics 230 (Problem 10-9 continued) (b) 10-10. (a) (b) 10-11. (a) There are n a conduction electrons per unit volume, each occupying a sphere of volume : (b) 10-12. (a) for 1 electron/atom (b) Both agree with the values given in Table 10-3.
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Chapter 10 ! Solid State Physics 231 10-13. (a) for two free electrons/atom (b) Both are in good agreement with the values in Table 10-3, for Mg and for Zn. 10-14. (a) (b) (c)
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Chapter 10 ! Solid State Physics 232 10-15. (a) for Cu: (b) for Li: 10-16. A long, thin wire can be considered one-dimensional. (Equation 10-30) For Mg : 10-17. (a) For Ag: For Fe: Similarly, E F = 11.2 eV (b) For Fe: Similarly, T F = 13.0 × 10 4 K Both results are in close agreement with the values given in Table 10-3.
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Chapter 10 ! Solid State Physics 233 10-18. Note from Fig.10-14 that most of the excited electrons are within about 2kT above the Fermi energy
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This homework help was uploaded on 04/03/2008 for the course PHYSICS 7C taught by Professor Lin during the Spring '08 term at University of California, Berkeley.

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ismchapter10edition4 - Chapter 10 ! Solid State Physics...

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