Phase Changes

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Phase Changes

• Looking at Boiling, Melting, and Freezing points,
  Evaporation and Condensation

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Physical science series phases of matter 18 min
video

• http//player.discoveryeducation.com/index.cfm?gui
  dAssetIdCCAD037E-5E2D-4AC3-9929-090E6277C929blnF
  romSearch1productcodeUS

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Phase Change

• Matter can change from one phase to another.
• This is called a Phase Change

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Phase Changes

• The amount of heat energy in any particular piece
  of matter can change.
• A big enough change in heat energy causes a phase
  change.
• Solids Liquids Gas
• There are different names for each of the phase
  changes.

Add Heat Energy
Add Energy
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Different names for each Phase Changevocabulary

• Condensation- change from a gas to a liquid.
• Freezing change from a liquid to a solid.
• Sublimation change from a solid to a gas

• Melting- change from a solid to a liquid
• Vaporization change from liquid to gas.
• Boiling
• Evaporation

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Vaporization

• Difference between boiling and evaporation
• Evaporation happens at the surface usually
  due to suns energy.
• Boiling happens within the liquid. Inside of
  liquid changes to a gas, this is why there are
  bubbles.

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Phase Changes
Phase Changes are Caused by either an increase or
decrease in heat energy (temperature).

• Increase temp-
• Melting
• Sublimation
• Evaporation
• Boiling

• Decrease temp-
• Condensation
• Freezing

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Phase Change Points

• Each substance has a temperature that it changes
  phase at.
• Different for all substances!
• For example, freezing point for water is 0ºC.
  The freezing point for gold is approximately
  1064ºC.
• boiling point, freezing point, melting point,
  condensation point all do not change if you have
  more or less of the substance.

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• Temperatures at which one state turns to
  another 
• BOILING POINT- liquid turns to gas
• MELTING POINT solid turns to liquid
• FREEZING POINT liquid turns to solid
• BOILING POINT of water- 100 C (or
  above)
• MELTING POINT of water - 0 C (or
  above)
• FREEZING POINT of water- 0C  (or
  below

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Water
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Interactive matter phase change

• http//www.miamisci.org/af/sln/phases/watersolid.h
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