A sealed metal cylinder contains argon gas under pressure.
The temperature of the cylinder and the argon gas increases.
Which statement describes what happens to the pressure in the cylinder and gives the correct reason why the pressure changes?
The pressure decreases because the argon particles move more slowly.
The pressure decreases because the argon particles move faster.
The pressure increases because the argon particles move more slowly.
The pressure increases because the argon particles move faster.
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.