Suggest — 2 marks
A student investigates how pressure changes when a gas is compressed. They use a syringe filled with air at atmospheric pressure and push the plunger down, reducing the volume of gas inside without allowing any gas to escape.
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Suggest why the pressure of the gas increases when the plunger is pushed down.
[1 mark]
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Suggest how the rate of collisions between gas particles and the syringe walls changes as the volume decreases.
[1 mark]
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State — 5 marks
A student is investigating how gases behave in containers. They have a sealed syringe containing air at room temperature and atmospheric pressure. When they push the plunger in, they notice the air becomes harder to compress and the syringe feels warmer.
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State what happens to the particles in the air when the plunger is pushed in.
[2 marks]
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State how the pressure of the gas changes when the volume is reduced, and explain why in terms of particles.
[2 marks]
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State one reason why the syringe feels warmer when the plunger is pushed in quickly.
[1 mark]
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