Phase Changes Worksheet
Phase Changes Worksheet Name ______________
Kinetic Theory of Matter:
• Molecules are always moving. This is known as the kinetic theory of matter.
• We measure this kinetic energy with a thermometer as temperature.
• The greater the material's internal energy, the higher the temperature of that material.
• Heat is the energy flow between objects of different temperature.
• Heat and temperature are NOT the same.
• Brownian motion describes how visible particles are seen moving due to invisible molecules bumping into them.
Phases of Matter: Define each phase of matter and describe in terms of kinetic energy
Solid
Liquid
Gas
Phase Change Descriptions:
Draw a picture or write an alternate description that will help you remember each definition…
Melting
the change from solid to liquid.
Freezing
the change from liquid to solid.
Vaporization
the change from liquid to gas.
Evaporation
vaporization from the surface of a liquid.
Boiling
vaporization from within as well as from the surface of a liquid.
Condensation
the change from gas to liquid.
Sublimation
the change from solid to gas.
Deposition
the change from gas to solid.
Fill in the phase changes in the blank provided.
[pic]
[pic]
1. Fill in 7-11 on the graph
2. On the graph name and describe the state at point A, C, and E.
3. On the graph show the temperatures/locations for boiling and freezing in °C and Kelvin.
4. Why is the temperature constant at B and D? What event is occurring there?
5. What is the area of highest Kinetic energy on the graph? Explain
6. What is the area of lowest Kinetic energy on the graph? Explain
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