Page 53 Changes in State What are molecules? the smallest particle of a compound.
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Transcript of Page 53 Changes in State What are molecules? the smallest particle of a compound.
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Page 53
Changes in State
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What are molecules?
the smallest particle of a compound
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What are atoms?
the smallest particle of an element.
Atoms and molecules are always in motion.
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Temperature At higher temperatures (HOT), atoms move faster. At lower temperatures (COLD), atoms move slower.
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FLASHBACK
What is temperature, anyway?
Temperature is a measure of the average energy of molecules and is related to their average velocity (speed).
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What are the states of matter?
solid, liquid, gas, or plasma.
Molecules in solids, liquids, and gases vibrate (move) differently depending on the temperature.
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Solids:A solid has a definite shape and definite size.Molecules vibrate, but cannot change position.
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Liquids have a definite volume, but no definite shape.Molecules move over and around each other.
Liquids:
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A gas has no definite volume or shape. It will spread out to fill its container.Molecules move
around freely and are widely separated from each other.
Gases:
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When molecules are super-heated and lose their outer layer Exists on the sun, in neon lights, and when you see lightning.
Plasma:
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solid to a liquid.Different substances have different melting point temperatures.
What is melting?
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a liquid to a solid.The freezing point of a substance is the same temperature as its melting point.
What is freezing?
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a liquid to a gas.
Different substances have different boiling point temperatures.
What is boiling?
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a liquid to a gas.
occurs at room temperature and at the surface of the liquid.
Evaporation is not the same as boiling.Boiling occurs at a
higher temperature and occurs within the fluid.
What is evaporation?
What is the difference between boiling and evaporation?
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a gas to a liquid.
The condensation point of a substance is the same temperature as its boiling point.
What is condensation?
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changes directly from a solid to a gas.
What is sublimation?
Example: Dry ice
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from a gas to a solid.
Example: Water vapor in the freezer becomes frost.
What is deposition?
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At lower air pressure (higher altitude), water boils at a lower temperature.Freezing points are also affected.
How does pressure affect state changes?
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What is a triple point?
When temperature and pressure allow a substance to exist 3 states at once.
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What time is it… SUMMARY TIME!
YOU HAVE 3 MINUTES TO SUMMARIZE AT LEAST 5 THINGS YOU LEARNED
TODAY. MAKE SURE YOU WRITE IN COMPLETE
SENTENCES.
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What time is it… SUMMARY TIME!
YOU HAVE 2 MINUTES TO SUMMARIZE AT LEAST 5 THINGS YOU LEARNED
TODAY. MAKE SURE YOU WRITE IN COMPLETE
SENTENCES.
![Page 22: Page 53 Changes in State What are molecules? the smallest particle of a compound.](https://reader035.fdocuments.net/reader035/viewer/2022070401/56649f1c5503460f94c31ea8/html5/thumbnails/22.jpg)
What time is it… SUMMARY TIME!
YOU HAVE 1 MINUTES TO SUMMARIZE AT LEAST 5 THINGS YOU LEARNED
TODAY. MAKE SURE YOU WRITE IN COMPLETE
SENTENCES.
![Page 23: Page 53 Changes in State What are molecules? the smallest particle of a compound.](https://reader035.fdocuments.net/reader035/viewer/2022070401/56649f1c5503460f94c31ea8/html5/thumbnails/23.jpg)
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freezingSOLID LIQUID
GAS
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Fill out your Bingo Card!MoleculesAtomsSolidLiquidGasPlasmaTemperaturePressureTriple PointMeltingFreezingSublimation
DepositionCondensationEvaporationElementCompoundHomogeneous MixtureHeterogeneous MixtureMatterSubstance