An airtight glass flask holds a volume of gas. A liquid-in-glass thermometer is inserted through a rubber stopper to monitor the temperature.
State what happens to the liquid inside the thermometer stem when the temperature of the gas rises.
The initial temperature of the gas in the flask is 24∘C24^\circ\text{C}24∘C. Calculate this temperature in kelvin.
The flask is then placed in a hot water bath, causing the temperature of the gas inside to increase. State and explain what happens to the pressure exerted by the gas. Use your ideas about gas particles.
In another experiment, gas inside a container exerts a pressure of 115 000 N/m2115\,000\text{ N/m}^2115000 N/m2 on a flat stopper. The area of the stopper is 0.0064 m20.0064\text{ m}^20.0064 m2. Calculate the force exerted on the stopper by 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.