A copper saucepan holds water. Fig. 2.1 depicts the pan resting on a cooker hotplate. Copper is a metal.
(a)[3]
Thermal energy is conducted through all solids by lattice vibrations. Describe one other way in which thermal energy is conducted through the copper.
(b)[2]
Explain one other advantage of keeping the surface of the pan shiny.
(c)[1]
Identify the main method by which thermal energy is transferred throughout the water.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Free electrons / delocalised electrons / mobile electrons” …