The temperature of a gas in a sealed container of fixed volume is reduced, causing the gas particles to lose energy from their kinetic store. Which of the following describes the effects of this change on the gas?
Both the pressure of the gas and the average speed of its particles decrease.
Only the pressure of the gas decreases, while the average speed of its particles remains constant.
Only the average speed of its particles decreases, while the pressure of the gas remains constant.
Neither the pressure of the gas nor the average speed of its particles decreases.
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.