L2: States of Matter (P.31-39)

This heating curves of water supports that during a change of state (melting or boiling)..

• The temperature and kinetic energy remain constant but the potential energy increases

• The temperature and kinetic energy increase quickly while potential energy stays the same.

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This heating curve of water supports that when only one state of matter is present and no change of state is occur

• The temperature and kinetic energy begin to increase quickly

• The temperature and kinetic energy remain constant and potential energy changes.

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This is the process in which a liquid changes to a gas when particles gain energy.

• Vaporization

• Condensation

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This is the process in which a gas changes to a liquid when particles lose energy.

• Vaporization

• Condensation

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Vaporization that occurs on the surface of a liquid is called

• Evaporation

• Boiling

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Vaporization that occurs within or inside a liquid is called

• Evaporation

• Boiling

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What do these pictures show you

• Condensation is when gas turns to liquid

• Condensation and evaporation are the same process.

• Evaporation happens when liquid turns to gas.

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Chosee the three true statments below:

As particles change states, the following may happen

• The temperature alway increases

• The speed of the particles will change.

• The distance between particles will change

• The particles begin to occupy more or less volume

• Particle motion stays the same

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Gallium has a melting point of about

• 30C/85F

• 38C/100F

• 93C/200F

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At higher temperatures

• particles in an object have less energy
• particles in an object move faster and occupy more volume

• particles contract and occupy less volume

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