A solar water heater contains a tank of liquid that is heated by solar radiation during the day. During the night, the liquid cools down, releasing thermal energy to warm a building. Which combination of thermal capacity of the liquid and daytime temperature increase will result in the least amount of thermal energy being stored by the liquid?
thermal capacity of liquid is large, daytime temperature increase is large
thermal capacity of liquid is large, daytime temperature increase is small
thermal capacity of liquid is small, daytime temperature increase is large
thermal capacity of liquid is small, daytime temperature increase is small
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.