Physics 5054 · O Level · Thermal expansion of solids, liquids and gases
Thermal expansion of solids, liquids and gases — practice question
Fig. 3.1 shows a copper kettle with a cylindrical shape holding cold water. It is used to warm the water, and an electric heater is fitted at the bottom.
(a)[2]
State and explain why it is advantageous to heat the water from below.
(b(i))[2]
Explain, in terms of molecules, why water expands on heating.
(b(ii))[1]
Copper also expands on heating. State what happens to level X of the water in the kettle. Explain your answer in terms of how the copper expands and how the water expands.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Water is heated evenly / becomes mixed / spreads heat” …