3 states of matter and changes of state

I will be able to explain what a change in state is and describe how matter changes state... What happens to matter when a change of state occurs?• Energy / Motion of Partic I will be a

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What are the states of Matter?

• Matter

– All matter is made of atoms.

– Atoms are in constant motion.

– Particle movement determines

the state of matter.

• States of Matter.

– Solid

– Liquid

– Gas

I will be able to define and describe matter and the

three states of matter.

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• Water, ice has more space

between atoms than liquid water

That is why it _.

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• Moving very fast.

• Most kinetic energy.

– Move faster when heat is applied.

– Move slower when heat is taken away.

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What is a change in State?

• Liquid water to ice.

I will be able to explain what a change in state is

and describe how matter changes state.

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• Energy Gained or Lost

– To change state, energy

must be added or

removed

– Gaining or losing energy

changes the temperature

of a substance

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What happens to matter when a change of state occurs?

• Energy / Motion of Partic

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• Energy / Motion of

Particles.

• Solids

– Vibrate in place, particles close together

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Particles.

• Liquids

– Move around – Particles further apart.

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Particles.

•

Gas-– Move quickly – Particles very far apart.

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• Vaporization

– Process by which liquids

or solids change to a gas

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• Sublimation

– Change in state from a

solid directly into a gas

(skips liquid phase)

• Add heat

• Atoms gain energy

• Escape into the air as a gas.

• Example: Dry Ice

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• Evaporation

– Add heat to a liquid

• Atoms gain energy.

• Move faster

– Evaporation

• Particles can escape from the surface of a liquid if enough heat is added.

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• Boiling

– A rapid change from a

liquid to a gas (vapor)

– Boiling Point

• The temperature at which this occurs in a liquid.

– 100°C – 212°F

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• Condensation

– The change in state from

a gas to a liquid

• Cooling a gas

• Particles lose energy.

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• Deposition

– Change in state from a gas

directly to a solid

• Substance cools.

• Atoms lose energy

• No liquid forms in the process.

• Example:

– Water vapor turns into ice crystals.

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• Mass is Conserved

– The amount of matter stays

the same during a phase

change.

– The mass does not change

when its state changes.

– Each state contains the

same amount of matter.

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• Mass is Conserved

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