Objectives
1. Explain why evaporation of water is a cooling process.
23.2 Condensation
2. Explain why condensation is a warming process.
23.3 Evaporation and Condensation Rates
3. Explain why a person with wet skin feels chillier in dry air than in moist
air at the same temperature.
23.4 Boiling
4. Explain the difference between evaporation and boiling.
5. Explain why food cooked in boiling water takes longer to cook at high
altitudes than at sea level.
23.5 Freezing
6. Explain why water with substances dissolved in it freezes at a lower
temperature than pure water.
23.6 Boiling and Freezing at the Same Time
7. Describe the circumstances under which something can boil and freeze at the
same time.
23.7 Regelation
8. Give examples of the tendency of ice to melt under pressure and refreeze
when the pressure is removed.
23.8 Energy and Changes of Phase
9. Describe the conditions for a substance to absorb or release energy with
no resulting change in temperature.
Misconceptions
Note: The following statements are all FALSE!!!
1. Constant temperature of something indicates all the molecules have the
same energy.
2. Boiling is a warming process.
3. Ice melts only when heat is added.