1.Take out your homework
packet.
2.What questions do you want
us to review?
States of Matter
Chapter 2
• What happened when we rubbed
the alcohol on our
hands/desks??
• What types of things can we do
to change water into ice, steam,
liquid??
Changes of State
• Chapter 2; Section 2
I. Changes of State
• Physical changes
• Converting from 1 form to
another
• Change the energy of substances
• Does ice or liquid water have
more energy? (energy of motion)
1. Temperature
• Measure speed of particles
• Measure of energy (of motion)
• Use a thermometer
• Which has a higher
temperature, steam or liquid
water?
• Which has a higher energy,
steam or liquid water?
• Make a Venn Diagram
comparing liquid and gas with
regards to state of matter,
particle motion, temperature
and energy.
L...
• Share your Venn Diagram with
your neighbor.
• Talk about all the ideas you know
and can explain about Liquids and
Gases....
2. Heat
• Transfer energy
• Cause change in temperature
3. Endothermic vs Exothermic
• ENDothermic = absorbs heat/energy
• EXOthermic = releases heat/energy
• What is the difference between
endothermic and exothermic
reactions?
• Give 1 example of each process.
Changes of State…
Endo or
Exo?
What is
happening?
Special stuff?
Melting
Freezing
Vaporization
Condensation
Sublimation
A. Melting
• Endothermic (Motion of molecules
increases)
• Solid to liquid
B. Freezing
• Exothermic (Motion decreases)
• Liquid to solid
C. Vaporization
• Endothermic (Motion increases)
• Liquid to gas
a. Boiling: throughout the liquid
b. Evaporation: on the ...
D. Condensation
• Exothermic (Motion of molecules
decreases)
• Gas to liquid
E. Sublimation
• Endothermic (Motion increases)
• Solid to gas
Melting vs Freezing
• Same temperature
• Called the melting point
• T or F Evaporation can occur
at any temperature.
• T or F Boiling occurs only at
the surface of a liquid.
• T or F Vapor...
Vaporization vs
Condensation
• Same temperature
• Called boiling point
1.What is mass?
2.Do you think changes of state affect
mass? Why or why not?
1.What happened to the mass of the
apparatus while it heated?
2.Why did the balloon inflate?
3.What state change occurred?...
1.What is the phase change that
converts liquids to gases?
2.What is the name of the point at
which this change occurs?
1. At your table, share data and
observations from the Hot-Cold lab
with the people you sit with.
1. In the Hot and Cold lab, what state
change occurred with the ice
buckets?
2.What did you do in that experiment
to lower...
Heat (thermal energy)
TemperatureºC.
100
0
A
B
C
D
E
solid
liquid
gas
Water Phase Change GraphChanging the state of water ...
Heat (thermal energy)
TemperatureºC.
100
0
A
B
C
D
E
solid
liquid
gas
Heat (thermal energy)
TemperatureºC.
100
0
A
B
C
D
E
melting
freezing
condensing
boiling
Changes of state occur between
B-C and D-E. What happens to
the temperature during the
state changes?
Phase Change Diagram
Label the five arrows below with
The name of the change of state:
SOLID LIQUID GAS
melting vaporization
sublimation
conden...
1.What is the difference between
condensation and vaporization?
2.What is similar between
condensation and vaporization?
Warm up
1.Take out your Chapter 2
review sheet.
2.With your group members,
arrange the arrows,
pictures, and words to show...
Gas Laws
Chapter 2
Test Review
ENDOTHERMIC ENDOTHERMIC
EXOTHERMIC EXOTHERMIC
ENDOTHERMIC
Melting Vaporization
Sublimation
CondensationFreezing
Internet Demos…
Which law is it?
Why?
Which law is it?
Why?
Scientific Method…
In a science experiment, you have
several factors:
1. Constant: the item that is not
changing throughou...
Vacuum Pump Demo:
What 2 variables are
being changed?
Which law is being
demonstrated?
Why do you know?
Glove Demo:
What 2 variables are
being changed?
Which law is being
demonstrated?
Why do you know?
Pumpkin Demo:
Is this reaction
endothermic or
exothermic?
Why do you
know?
State change graph:
Is this graph endothermic or
exothermic? Why?
What states are present at A, C, E?
What state changes h...
Extension…
How can you
change the boiling
point or freezing
point of water?
(Hint: you probably do this and don’t know exa...
1.Complete the exit slip on your
desk.
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Changes of state notes

  1. 1. 1.Take out your homework packet. 2.What questions do you want us to review?
  2. 2. States of Matter Chapter 2
  3. 3. • What happened when we rubbed the alcohol on our hands/desks??
  4. 4. • What types of things can we do to change water into ice, steam, liquid??
  5. 5. Changes of State • Chapter 2; Section 2
  6. 6. I. Changes of State • Physical changes • Converting from 1 form to another • Change the energy of substances
  7. 7. • Does ice or liquid water have more energy? (energy of motion)
  8. 8. 1. Temperature • Measure speed of particles • Measure of energy (of motion) • Use a thermometer
  9. 9. • Which has a higher temperature, steam or liquid water?
  10. 10. • Which has a higher energy, steam or liquid water?
  11. 11. • Make a Venn Diagram comparing liquid and gas with regards to state of matter, particle motion, temperature and energy. Liquid Gas
  12. 12. • Share your Venn Diagram with your neighbor. • Talk about all the ideas you know and can explain about Liquids and Gases. • If time remains, talk about solids too Liquid Gas
  13. 13. 2. Heat • Transfer energy • Cause change in temperature
  14. 14. 3. Endothermic vs Exothermic • ENDothermic = absorbs heat/energy • EXOthermic = releases heat/energy
  15. 15. • What is the difference between endothermic and exothermic reactions? • Give 1 example of each process.
  16. 16. Changes of State… Endo or Exo? What is happening? Special stuff? Melting Freezing Vaporization Condensation Sublimation
  17. 17. A. Melting • Endothermic (Motion of molecules increases) • Solid to liquid
  18. 18. B. Freezing • Exothermic (Motion decreases) • Liquid to solid
  19. 19. C. Vaporization • Endothermic (Motion increases) • Liquid to gas a. Boiling: throughout the liquid b. Evaporation: on the surface
  20. 20. D. Condensation • Exothermic (Motion of molecules decreases) • Gas to liquid
  21. 21. E. Sublimation • Endothermic (Motion increases) • Solid to gas
  22. 22. Melting vs Freezing • Same temperature • Called the melting point
  23. 23. • T or F Evaporation can occur at any temperature. • T or F Boiling occurs only at the surface of a liquid. • T or F Vaporization is simply a liquid changing to a gas.
  24. 24. Vaporization vs Condensation • Same temperature • Called boiling point
  25. 25. 1.What is mass? 2.Do you think changes of state affect mass? Why or why not?
  26. 26. 1.What happened to the mass of the apparatus while it heated? 2.Why did the balloon inflate? 3.What state change occurred? 4.When a liquid turns to a gas, what happens to its mass? Volume? Density?
  27. 27. 1.What is the phase change that converts liquids to gases? 2.What is the name of the point at which this change occurs?
  28. 28. 1. At your table, share data and observations from the Hot-Cold lab with the people you sit with.
  29. 29. 1. In the Hot and Cold lab, what state change occurred with the ice buckets? 2.What did you do in that experiment to lower the freezing point of the ice below 0oC? (you do this all the time in the winter)
  30. 30. Heat (thermal energy) TemperatureºC. 100 0 A B C D E solid liquid gas Water Phase Change GraphChanging the state of water graph
  31. 31. Heat (thermal energy) TemperatureºC. 100 0 A B C D E solid liquid gas
  32. 32. Heat (thermal energy) TemperatureºC. 100 0 A B C D E melting freezing condensing boiling
  33. 33. Changes of state occur between B-C and D-E. What happens to the temperature during the state changes?
  34. 34. Phase Change Diagram
  35. 35. Label the five arrows below with The name of the change of state: SOLID LIQUID GAS melting vaporization sublimation condensationfreezing
  36. 36. 1.What is the difference between condensation and vaporization? 2.What is similar between condensation and vaporization?
  37. 37. Warm up 1.Take out your Chapter 2 review sheet. 2.With your group members, arrange the arrows, pictures, and words to show the state changes of water.
  38. 38. Gas Laws Chapter 2 Test Review
  39. 39. ENDOTHERMIC ENDOTHERMIC EXOTHERMIC EXOTHERMIC ENDOTHERMIC Melting Vaporization Sublimation CondensationFreezing
  40. 40. Internet Demos…
  41. 41. Which law is it? Why?
  42. 42. Which law is it? Why?
  43. 43. Scientific Method… In a science experiment, you have several factors: 1. Constant: the item that is not changing throughout the experiment 2. Independent variable: The factor the scientist is changing 3. Dependent variable: The factor that changes because of the independent variable
  44. 44. Vacuum Pump Demo: What 2 variables are being changed? Which law is being demonstrated? Why do you know?
  45. 45. Glove Demo: What 2 variables are being changed? Which law is being demonstrated? Why do you know?
  46. 46. Pumpkin Demo: Is this reaction endothermic or exothermic? Why do you know?
  47. 47. State change graph: Is this graph endothermic or exothermic? Why? What states are present at A, C, E? What state changes happen at D, B? A. B. C. D. E.
  48. 48. Extension… How can you change the boiling point or freezing point of water? (Hint: you probably do this and don’t know exactly why!)
  49. 49. 1.Complete the exit slip on your desk.

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