An investigator studies the behavior of a fixed mass of gas trapped inside a research cylinder with a tightly sealed, movable piston. The relationship between the pressure and the volume of the gas is given by the equation:
pressure×volume=constant\text{pressure} \times \text{volume} = \text{constant}pressure×volume=constant
State the physical quantity, other than mass, that must be kept constant for this relationship to hold.
The initial volume of the gas inside the cylinder is 35 cm3 and its initial pressure is 140,000 Pa140,000\text{ Pa}140,000 Pa. Calculate the value of the constant in Pa cm3\text{Pa cm}^3Pa cm3.
The piston is pushed slowly inwards so that the gas is compressed and its volume decreases to 28 cm3. Calculate the new pressure of the gas in Pa\text{Pa}Pa.
Choose whether there is more space, less space, or the same space between the gas particles as the volume decreases.
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.