1. PHASE CHANGES OF WATER & ENERGY
Page 10

2. LATENT HEAT- energy used to cause a phase change but does not increase the temperature of a substance (hidden heat)
Page 10

3. Heat Energy and Phase Change
Page 11

4. Questions No Yes Heat Energy Particles get further apart
Boiling or evaporation or vaporization
Page 10

5. Page 11 Phase Change Diagram Temperature F D E B C A Heat Energy
Losing Heat Energy D
condensation E
evaporation
freezing B
Gaining Heat Energy C
melting A
Heat Energy
A  B (_______)
C  D (_______)
solid
E F (______)
gas
liquid

6. ¾ OF THE ENERGY ABSORBED BY EARTH EVAPORATES WATER FROM THE OCEANS
EVAPORATION
2260 JOULES/GRAM GAINED
The gram of water absorbed 2260 calories of latent heat as it changed to vapor (require addition of energy)
COOLING EFFECT
CONDENSATION
2260 JOULES/GRAM RELEASED
The gram of water released 2260 calories of latent heat as it changed to liquid (give off energy)
WARMING EFFECT

7. Page 12
Found on Page 1 of Earth Science Reference Tables

8. Check the box which describes whether energy
is gained or lost for each process.
Process
Energy Gained
Energy Lost
Condensation
Evaporation
Melting
Solidification
Page 11

9. Page 12
How many joules are gained or lost by water for each of the following processes?
Process
Joules Gained
Joules Lost
Condensation
Evaporation
Melting
Solidification
2260
2260
334
334

10. Definition- the amount of energy required to raise the temperature of
Page 12
Specific Heat
Definition- the amount of energy
required
to raise the temperature of
1 gram of a substance 1°C
Please go to Page 1 of the
Earth Science Reference Tables.

11. Found on Page 1 of Earth Science Reference Tables

12. Why does water heat up and cool Water has a higher specific heat
down slower than land?
Water has a higher specific heat
Page 12

13. because it has a lower specific heat
If you heated equal masses of
basalt and lead, which one would
record a faster increase in
temperature? Explain how you know.
the lead
because it has a lower specific heat
Page 12

14. Which Earth material has the greatest specific heat?
liquid water
Page 12

15. Discussion Questions
Page 13 C A B D C B C A B D