An experiment is set up to measure the specific latent heat of vaporisation of water using a 1.5 kW heater. After the water begins to boil, 120 g of water is converted to steam in 180 s.
Using these results, what is the value of the specific latent heat of vaporisation of water?
2.25 J/kg2.25\text{ J/kg}2.25 J/kg
2250 J/kg2250\text{ J/kg}2250 J/kg
225 000 J/kg225\ 000\text{ J/kg}225 000 J/kg
2 250 000 J/kg2\ 250\ 000\text{ J/kg}2 250 000 J/kg
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.