A container filled with a certain volume of liquid ethanol and an identical container filled with the same volume of air are both heated through the same temperature rise.
Which of them will show the greater expansion, and why?
Which? _________________________________________
Why? _________________________________________
To create a vacuum-tight seal in a glass electronic component, a metal wire must be embedded directly and sealed through the glass.
The list below shows the expansion of a 1 m1\text{ m}1 m length of each material when the temperature rises by 1 ∘C1\text{ }^\circ\text{C}1 ∘C:
Use this information to decide which metal should be used for the wire, why it is suitable, and why the other metal is unsuitable.
Which metal should be used? _________________________________________
Why is it suitable? _________________________________________
Why is the other metal unsuitable? _________________________________________
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.