Topic: Chemistry Aim: Explain the different types of phase changes.
-
Upload
lesley-little -
Category
Documents
-
view
216 -
download
0
Transcript of Topic: Chemistry Aim: Explain the different types of phase changes.
![Page 1: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/1.jpg)
Topic: ChemistryAim: Explain the different types of phase changes.
![Page 2: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/2.jpg)
Review:1. Identify the different phases of matter.2. The particles of a substance are closest
together in a _____.3. The particles of a substance that does
not have a definite volume or shape is4. Identify an example of a physical
change.5. What are 2 physical properties of
matter?6. Give 1 example of a chemical property.
![Page 3: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/3.jpg)
Phase Changes• Involves the
absorption or release of heat (energy).
![Page 4: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/4.jpg)
1. Melting•Solid liquid
• Melting point: temp at which a solid changes to liquid (different for every substance)
Substance absorbs heat energy
![Page 5: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/5.jpg)
2. Freezing• Liquid solid
• Freezing point: temp at which substance changes from liquid to solid
Substance loses heat energy
![Page 6: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/6.jpg)
3. Evaporation
LIQUID
GASLiquid absorbs heat energy
• Liquid gas
• Boiling point: temp at which liquid boils (different for every substance)
![Page 7: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/7.jpg)
4. Condensation•Gas liquid
LIQUID
GASGas loses heat energy
![Page 8: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/8.jpg)
![Page 9: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/9.jpg)
5. Sublimation•Solid Gas• No liquid phase• Ex: dry ice
Solid
GASSolid absorbs heat energy
![Page 10: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/10.jpg)
Freezing
LS
Melting SL
Evaporation LG
Condensation GL
Add heat Energy absorbed by molecules
Remove heat Energy released by molecules
PHASE CHANGES
SOLID LIQUID GAS
![Page 11: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/11.jpg)
Time
T
E
M
P
Freezing/melting point = 0°C
Boiling pt =
100°C
SO
LID
LIQ
UID
GAS
100°C
0°C
Melting
Freezing
Evaporation
Condensation
PHASE CHANGE GRAPH FOR WATER
= phase changes
![Page 12: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/12.jpg)
REVIEW:1. When a liquid becomes a solid, energy
____.2. ____ is the process in which liquid
changes to gas below the boiling point. 3. The change of a liquid to a solid is
called__.4. What happens to the position of water
molecules as they lose heat energy?5. Identify one phase change in which
energy is released.
![Page 13: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/13.jpg)
1. Melting•Solid liquid• Heat added/absorbed • molecules move faster & farther apart• Melting point: temp at which a solid changes to liquid (different for every substance)
Substance absorbs heat energy
![Page 14: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/14.jpg)
2. Freezing• Liquid solid• Liquid heat energy/energy released • Molecules slow down & come closer together• Freezing point: temp at which substance
changes from liquid to solid
Substance loses heat energy
![Page 15: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/15.jpg)
3. Evaporation
LIQUID
GASLiquid absorbs heat energy
• Liquid gas• Heat added/absorbed (faster & farther)• On surface of liquid evaporation• Boiling point: temp at which liquid
boils (different for every substance)
![Page 16: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/16.jpg)
4. Condensation•Gas liquid• Gas loses heat energy/energy
released• (slow down & closer together)
LIQUID
GASGas loses heat energy
![Page 17: Topic: Chemistry Aim: Explain the different types of phase changes.](https://reader035.fdocuments.in/reader035/viewer/2022062517/56649eff5503460f94c150c3/html5/thumbnails/17.jpg)
Moth balls commonly undergo the process of sublimation. Sublimation is the process in which a solid changes directly to its gaseous phase, skipping the liquid phase.