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Condensing

Key Stage 2

Meaning

Condensing is when a gas turns into a liquid.

Noun: Condensation
Verb: To condense
Present Participle: Condensing
When you cool a gas:
Condensing.png
A gas will condense to become a liquid.

About Condensing

Cooling a gas will cause it to condense into a liquid.
Condensing is a reversible process. When a gas condenses into a liquid you can evaporate that liquid back into a gas.
You may have seen water condensing.
WaterCondensing.png
SteamCloudDiagram.png
Water Vapour in the air condenses into liquid water onto a cold bottle. The Steam coming out of kettle condenses into a cloud of liquid water droplets.

Key Stage 3

Meaning

Condensing is an exothermic process in which a gas turns into a liquid.

About Condensing

Condensing is a reversible process. When a gas condenses into a liquid you can evaporate that liquid back into a gas.
Cooling a gas will cause it to condense into a liquid.
When you cool a gas:
ParticleModelCondensing.png
The particles in the gas slow down until they are slow enough that forces between the particles start to hold them together. The particles end up touching but can still move past each other which makes the state a liquid.

Key Stage 4

Meaning

Condensing is an exothermic physical change in which a gas turns into a liquid.

About Condensing

Condensing happens when the particles in a gas form bonds holding them together as they lose potential energy.
The temperature at which a substance condenses is the same as the temperature at which it boils so it is the boiling point.
Condensing is an exothermic process, which means it emits energy when it takes place.
Condensing is a physical change, which means it is reversible and does not produce new chemicals.
CondensingGraph.png
As energy is removed from the gas it condenses and the temperature of the substance stays the same.

References

AQA

Condensing pages 39, 40, GCSE Physics; The Revision Guide, CGP, AQA
Condensing, page 100, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
Condensing, page 102, GCSE Chemistry, CGP, AQA
Condensing, page 37, GCSE Chemistry; The Revision Guide, CGP, AQA
Condensing, pages 100-102, GCSE Combined Science Trilogy; Physics, CGP, AQA
Condensing, pages 110-112, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Condensing, pages 68-9, 329, GCSE Chemistry; Student Book, Collins, AQA
Condensing, pages 89, 122, 195, 196, GCSE Combined Science; The Revision Guide, CGP, AQA
Condesing, pages 88-9, GCSE Physics; Student Book, Collins, AQA

OCR

Condensing, pages 44, 82, 152, 154, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR