A student uses a sealed gas cylinder with an adjustable screw-threaded piston connected to a digital pressure sensor to investigate how the pressure of a fixed mass of gas varies with its volume at a constant temperature.
Table 1 shows the measurements obtained during the investigation.
Volume in cm3Pressure in kPa801054021032262.520420\begin{array}{|c|c|} \hline \text{Volume in } \text{cm}^3 & \text{Pressure in } \text{kPa} \\ \hline 80 & 105 \\ \hline 40 & 210 \\ \hline 32 & 262.5 \\ \hline 20 & 420 \\ \hline \end{array}Volume in cm380403220Pressure in kPa105210262.5420
Describe a method the student could use to obtain the data shown in Table 1.
Describe what happens to the pressure of the gas when the volume of the gas is reduced to one-quarter of its original value (for example, from 80 cm380\text{ cm}^380 cm3 to 20 cm320\text{ cm}^320 cm3).
The temperature of the gas inside the cylinder was kept constant during the experiment. Which two of the following properties of the gas particles would change if the temperature decreased?
- average kinetic energy
- mass of each particle
- average speed of the particles
- distance between particles when compressed
- volume of each individual particle
Particle model and pressure Questions
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.