A 0.50 kg sample of a solid is heated by a heater with a constant power output.
The temperature of the solid increases by 10 ∘C10\ {}^\circ\text{C}10 ∘C in the first 2.0 minutes. The temperature then stays constant for 8.0 minutes while the solid melts.
The specific heat capacity of the solid is 2000 J/kg ∘C2000\ \text{J/kg}\ {}^\circ\text{C}2000 J/kg ∘C.
Assume that all of the energy from the heater is transferred to the sample.
What is the specific latent heat of fusion of the solid?
4.0×104 J/kg4.0 \times 10^{4}\ \text{J/kg}4.0×104 J/kg
8.0×104 J/kg8.0 \times 10^{4}\ \text{J/kg}8.0×104 J/kg
1.6×105 J/kg1.6 \times 10^{5}\ \text{J/kg}1.6×105 J/kg
3.2×105 J/kg3.2 \times 10^{5}\ \text{J/kg}3.2×105 J/kg
44 exam-style questions on OCR GCSE Physics 1.2 Changes of state, covering 1.2.1 Conservation of mass during changes of state, 1.2.2 Physical and chemical changes, 1.2.3 Heating, temperature and changes of state, 1.2.4 Specific heat capacity and specific latent heat, 1.2.5 Internal energy and temperature change, and 1.2.6 Energy transfer during a change of state. Each one has a worked solution and a mark scheme showing where the marks go.