An oceanographic probe contains a flexible gas cell filled with a fixed mass of gas to monitor deep-sea pressure changes. The pressure and volume of the gas are related by the equation:
pressure×volume=constant \text{pressure} \times \text{volume} = \text{constant} pressure×volume=constantState the physical quantity, other than the mass of the gas, that must be kept constant for this relationship to hold.
The initial volume of the gas in the cell is 35 cm3 and its initial pressure is 240,000 Pa240,000\text{ Pa}240,000 Pa. Calculate the value of the constant in Pa cm3\text{Pa cm}^3Pa cm3.
As the probe descends, the gas cell is compressed slowly until its volume decreases to 14 cm3. Calculate the new pressure of the gas.
State whether there is more space, less space, or the same space between the gas particles after this decrease in volume.
8 exam-style questions on AQA GCSE Physics 3.3 Particle model and pressure, covering 3.3.1 Particle motion in gases, 3.3.2 Pressure in gases, and 3.3.3 Increasing the pressure of a gas (HT only). Each one has a worked solution and a mark scheme showing where the marks go.