A sealed syringe contains a fixed mass of gas.
Explain, in terms of the momentum of molecules, how the gas inside the syringe exerts a pressure.
Explain, in terms of molecules, why the pressure of the gas increases when the volume of the syringe is decreased by pushing the plunger. The temperature of the gas remains constant.
The initial volume of the gas is 120 cm3120\text{ cm}^3120 cm3 and its pressure is 1.05×105 Pa1.05 \times 10^5\text{ Pa}1.05×105 Pa. The plunger is pushed to reduce the volume of the gas to 40 cm340\text{ cm}^340 cm3. The temperature of the gas remains constant.
Calculate the new pressure of the gas.
321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.