A student investigates the relationship between the pressure and volume of a gas trapped inside a syringe.
At the start of the investigation, the volume of gas in the syringe is 36 cm336\text{ cm}^336 cm3 and the pressure gauge shows a value of 100 kPa100\text{ kPa}100 kPa.
State one variable that must be kept constant during this investigation.
The plunger of the syringe is pushed in so that the volume of the gas is decreased to 24 cm324\text{ cm}^324 cm3. Calculate the new pressure of the gas, assuming the temperature of the gas remains constant.
Explain, in terms of gas particles, why the pressure on the inside walls of the syringe increases when the volume of the gas is decreased.
Practise AQA GCSE Physics Particle model and pressure with exam-style questions for Foundation and Higher tier. 12 questions covering Particle motion in gases, Pressure in gases (physics only), and Increasing the pressure of a gas (physics only) (HT only), matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.