A sealed flexible bag contains air at a mountain station.
The air has a pressure of 75 kPa and a volume of 4.0 dm3.
The bag is taken down in a cable car to a lower station. At the lower station, the pressure of the air in the bag is 100 kPa.
The temperature of the air remains constant and no air leaks from the bag.
Calculate the volume of the air in the bag at the lower station.
Use the equation
V2=p1V1p2V_2=\dfrac{p_1V_1}{p_2}V2=p2p1V1
Explain why the volume of the air in the bag decreases during the journey to the lower station.
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.