Define:
1. phase change
13. melting point
2. intermolecular force
14. sublimation
3. van der Waals
15. deposition
4. dispersion force
16. phase diagram
5. dipole-dipole
17. heating curve
6. hydrogen bonding
18. specific heat
7. vapor
19. molar heat of fusion
8. evaporation
20. molar heat of vaporization
9. vapor pressure
21. surface tension
10. volatile
22. cohesion
11. boiling point
23. heat capacity
12. freezing point
Questions:
1. List and compare the three common states of matter.
2. Explain what happens on the molecular level during a phase diagram.
3. Explain how temperature can cause a phase change.
4. Explain how pressure can cause a phase change.
5. Explain how dispersion force can be created.
6. Why is boiling point a good method of determining the strength of
dispersion forces between molecules.
7. List and compare the different intermolecular forces. Which is the
strongest? Why?
8. Explain how vapor pressure is influenced by the number of molecules,
temperature and intermolecular forces.
9. Why does water boil at 95°C in Denver, Colorado?
10. How do intermolecular forces influence melting points?
11. Why do you include change in temperature when dealing with specific
heat but not in dealing with molar heat of fusion or vaporization?
12. Why is the heat of vaporization so much larger than the molar heat
of fusion?
13. Why are raindrops round?
14. How do intermolecular forces influence surface tension?
15. Compare the density of liquid water and ice.
16. List several properties of water.
Problems:
p. 475 4,5
p. 536 1,2,3
p. 539 4,5
p. 482 10, 11, 12
Ch. Review p. 495 5,10,11,12,13,18,23,31