Work on a Gas (AQA GCSE Physics): Flashcards

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Work on a Gas
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Doing work on a gas: effect on temperature

Increases temperature

Work done on gas formula

extPressureimesextVolume ext{Pressure} imes ext{Volume}

Meaning of doing work on a gas

Compressing or expanding gas (changing volume)

More particles, fixed volume: collisions

More collisions per unit time with walls

More particles, fixed volume: pressure

Pressure increases

More gas in fixed volume: heating

Heats gas (energy transferred to particles)

Smaller volume: particle-wall interaction

Particles collide with inward-moving wall

Smaller volume: effect on momentum

Particles gain momentum

Why momentum gained (smaller volume)

Rebound velocity > approaching velocity

Smaller volume: pressure effect

Pressure increases

Smaller volume: why pressure rises

More frequent collisions, less time between

Smaller volume: temperature effect

Temperature increases

Smaller volume: kinetic energy effect

Kinetic energy of each particle increases

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