A metal pot is placed on an electric stovetop. The pot contains water which is heated to a boil.
Thermal energy is transferred through the metal pot by conduction. State and explain the two mechanisms by which thermal energy is conducted in a metal.
When water boils, it changes from a liquid to a gas. Explain, in terms of forces and distances between particles, why the gas occupies a much greater volume than the liquid.
State two differences between boiling and evaporation.
The water is replaced with 180 cm3180\text{ cm}^3180 cm3 of canola oil.
The initial temperature of the canola oil is 20.0∘C20.0^\circ\text{C}20.0∘C. The oil is heated until it reaches a temperature of 190.0∘C190.0^\circ\text{C}190.0∘C.
The temperature reaches 190.0∘C190.0^\circ\text{C}190.0∘C when 53 800 J53\,800\text{ J}53800 J of thermal energy has been transferred to it. The density of canola oil is 0.920 g/cm30.920\text{ g/cm}^30.920 g/cm3.
Calculate the specific heat capacity of canola oil. Give your answer to 3 significant figures and include the unit.
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.