Volume and Pressure in Gases (Edexcel GCSE Physics Combined Science): Flashcards

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Volume and Pressure in Gases
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Cause of gas pressure

Collisions of gas particles with container walls

Direction of force from gas particle collisions

At right angles to container walls

Effect of more gas particles on pressure (same volume)

Higher pressure (more collisions)

Effect of decreasing volume on collisions

More frequent collisions

Type of relationship between volume and pressure

Inverse relationship

Pressure when volume increases

Pressure decreases

Pressure when volume decreases

Pressure increases

Boyle's Law equation

P×V=constantP \times V = constant

Boyle's Law alternative form

P1V1=P2V2P_1V_1 = P_2V_2

What P1P_1 and V1V_1 represent in Boyle's Law

Initial pressure and volume

What P2P_2 and V2V_2 represent in Boyle's Law

Final pressure and volume

Effect on flexible containers with more collisions

Container expands, increasing volume

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