O-LevelPhysicsThermal Physics5054/11 · May/June 2020 · Q231 Mark
The thermal energy produced by an electric heater in three minutes is used to melt wax. The solid wax is initially at its melting point of 60 °C. The specific latent heat of the wax is 220 J/g. The heater supplies 7700 J of thermal energy to the wax. Some of the wax melts. How much wax melts?
A0.58 g
B1.7 g
C12 g
D35 g
✓ Correct answer
D: 35 g
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