Board note: Eduqas (3420U) is the only board that tests the pressure law (p₁/T₁ = p₂/T₂ at constant volume, using Kelvin). It is not a separate Eduqas equation — it falls out of the combined gas law pV/T = constant, which Eduqas prints on its Higher-tier equation page. AQA, Edexcel, OCR A and OCR B do not test it: on all four, the only gas-law equation is Boyle's law below.
Pressure and volume (constant temperature) — Boyle's law:
p₁V₁ = p₂V₂
Compress a gas (reduce V) → particles hit walls more often → pressure increases. Used in syringes, bicycle pumps, and car engines. This equation is Physics only (not Combined Science) on AQA and on Edexcel (spec point 14.19P — Edexcel marks Physics-only content with a P), and every board gives it on the equation sheet as pV = constant — you don't need to memorise it, just apply it correctly.
This higher tier covers Higher Tier: Gas Laws and Calculations within Gas Pressure & Temperature for GCSE Physics. Revise Gas Pressure & Temperature in Particle Model for GCSE Physics with 29 exam-style questions and 30 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 8 of 11 in this topic. This section is most useful once the core foundation idea is secure, because it adds the detail that pushes answers higher.
Practice questions for Gas Pressure & Temperature
A sealed gas container is heated. What happens to the pressure of the gas inside?
A sealed gas cylinder is heated. Explain, using particle theory, why the pressure of the gas increases when the temperature increases.