Changes Of State And Specific Latent Heat (GCSE Physics)

A block of metal is heated and its temperature rises steadily. Which formula relates energy input, mass, specific heat capacity and temperature change?

A student finds the energy required to melt 0.2 kg of aluminium is 6.84 × 10^4 J. What latent heat of fusion did they calculate for aluminium?

A student measures the mass of water before and after boiling to find the mass evaporated. Which measurement change gives the best estimate of the mass evaporated?

A metal pan containing 0.8 kg of water is heated and the temperature rises from 20 °C to 60 °C. If c for water is 4200 J/kg °C, how much energy was absorbed by the water?

Which equation gives the energy required to melt a mass m of ice (latent heat of fusion)?

Which property explains why water has a high specific heat capacity compared with many other liquids?

During heating of a substance, a flat plateau appears on a temperature–time graph. What does the plateau represent?

A student measures energy input Q from an electrical heater by Q = V I t. Which instrument readings are needed?

Why does evaporation cool a liquid?

Which experimental error most directly affects the accuracy of a measured latent heat of vaporisation using mass loss and heater energy?

Why would wrapping insulation around a beaker reduce the measured rate of cooling?