As a pneumatic door closer shuts, its piston compresses a fixed mass of gas that initially occupies 75 cm3 at a pressure of 120 kPa. By the time the door has closed, the pressure of the gas has risen by 80 kPa. The temperature of the gas remains constant.
Use p1V1=p2V2p_1V_1=p_2V_2p1V1=p2V2.
What is the volume of the gas when the door has closed?
45 cm345\,\mathrm{cm^3}45cm3
113 cm3113\,\mathrm{cm^3}113cm3
125 cm3125\,\mathrm{cm^3}125cm3
30 cm330\,\mathrm{cm^3}30cm3
108 exam-style questions on Edexcel GCSE Physics 14.3 Gas pressure and temperature, covering 14.3.1 Gas pressure and particle motion, 14.3.2 Temperature and pressure at constant volume, 14.3.3 Absolute zero and the kelvin scale, 14.3.4 Compressing and expanding gases, 14.3.5 Volume and pressure at constant temperature, and 14.3.6 Doing work on a gas. Each one has a worked solution and a mark scheme showing where the marks go.