Learning objective
(Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Particle model and pressure
Subtopic
Pressure in gases (physics only)
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Quick explanation
(Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure
- This point belongs to Particle model and pressure, especially Pressure in gases (physics only).
- You need to be able to (Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure.
- The key ideas to know are volume, pressure, and constant temperature.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Pressure in gases (physics only) to exam-style questions, flashcards, and revision notes for Particle model and pressure.
Quick student answer
What should you know about (Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure?
Direct answer
In Physics, this page helps you answer questions about (Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure within Particle model and pressure. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are gas pressure and volume.
Key terms
- gas pressure: In Pressure in gases (physics only), gas pressure means in Pressure in gases (physics only), gas pressure means the force exerted by gas particles colliding with the walls of their container. Use this term when explaining (Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure in Particle model and pressure. It is curriculum-specific for AQA GCSE Physics 8463 because it links the word to the approved objective rather than a vague everyday meaning. Use this term when explaining (Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure in Particle model and pressure. It is curriculum-specific for AQA GCSE Physics 8463 because it links the word to the approved objective rather than a vague everyday meaning.
- volume: In Pressure in gases (physics only), volume means in Pressure in gases (physics only), volume means the amount of space occupied by a substance, measured in cubic meters (m³). Use this term when explaining (Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure in Particle model and pressure. It is curriculum-specific for AQA GCSE Physics 8463 because it links the word to the approved objective rather than a vague everyday meaning. Use this term when explaining (Physics only) Explain why increasing the volume of a gas at constant temperature decreases its pressure in Particle model and pressure. It is curriculum-specific for AQA GCSE Physics 8463 because it links the word to the approved objective rather than a vague everyday meaning.
Common trap
Volume and Pressure Relationship: To fix this, remember that at constant temperature, increasing the volume of a gas allows particles to collide with the walls less frequently, which decreases the pressure.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Describe gas particles as moving in constant random motion.
Particle motion in gases
- Explain that gas particles collide with each other and with the walls of their container.
Particle motion in gases
- Explain that collisions of gas particles with container walls exert a force on the walls.
Particle motion in gases
- Explain that the force from particle collisions produces gas pressure.
Particle motion in gases
- Describe how increasing temperature increases the average kinetic energy of gas particles.
Particle motion in gases