Topic 5 Notes Part 2
NB#_______________
Phase Changes:
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Melting _________  _____________
Freezing _________  _____________
Evaporation _________  _____________
Condenstaion _________  _____________
Sublimation _________  _____________
Depostion _________  _____________
Latent Heat: the heat required to convert a solid into a liquid or vapor, or a liquid into a
vapor, without change of temperature.
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Form of potential energy
Heat energy _______________________ or ____________________ during a phase change
Potential energy increase or decreases
Temperature (Kinetic Energy) of the material remains constant in between phases
Pg 1 ESRT Properties of Water
Temperature:_________________________________________________________________________
_____________________________________________________________________________________
Heat: _______________________________________________________________________________
____________________________________________________________________________________
Absolute Zero:_________________________________________________________________________
_____________________________________________________________________________________
Temperature Conversion
Convert:
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0⁰C to __________⁰F to __________________K
80⁰C to __________⁰F to __________________K
-10⁰C to __________⁰F to __________________K
Water Curve Diagram
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A  B ___________________________
BC ____________________________ Energy___________________________________
CD ____________________________
DE____________________________ Energy___________________________________
EF____________________________
ED____________________________ Energy___________________________________
CB____________________________ Energy___________________________________
1. Which group of substances is arranged in order of decreasing specific heat values?
1. iron, granite, basalt
2. copper, lead, iron
3. dry air, water vapor, ice
4. liquid water, ice, water vapor
2. During which phase change does water release the most heat energy?
1. freezing
3. condensation
2. melting
4. Vaporization
3. When water vapor condenses, how much heat energy will be released into the atmosphere?
1. 2260 joules/gram 3. 4.18 joules/gram
2. 334 joules/gram
4. 2.11 joules/gram
4. What best explains why, in early spring, ice remains longer on Lake Erie than on the surrounding land
areas when the air
temperature is above freezing?
1. Water has a higher specific heat than land.
2. Energy is needed for water to evaporate.
3. Cool winds from the surrounding land cool the ice on the lake.
4. Air temperature does not affect water temperature.
5. During which phase change will the greatest amount of energy be absorbed by 1 gram of water?
1. melting 3. evaporation
2. freezing 4. condensation
6. Which process requires water to gain heat energy from the environment?
1. evaporation
3. infiltration
2. condensation 4. Precipitation
7. How many joules are required to evaporate 1 gram of boiling water?
1. 1
3. 2260
2. 334 4. 6200
8. Which process requires water to gain 2260 joules of energy per gram?
1. vaporization 3. melting
2. condensation 4. Freezing
Figure 1
4
The graph shows the temperatures recorded when a sample of water was heated from −100°C to
+200°C. The water received the same amount of heat every minute.
9.For the time on the graph represented by the line from point B to point C, the water was {Refer to Figure
1}
1. freezing
2. melting
Figure 2
3. condensing
4. boiling
The graph shows the results of heating 10 grams of water from –100°C to +200°C. The same amount of
heat was added
during each minute.
[Refer to figure 2]
10. During which time interval was the rate of temperature change the greatest?
1. A to B
3. C to D
2. B to C
4. D to E