A factory pours a pure molten metal into moulds. The cooling system removes energy from each batch at the same constant rate. The table shows data collected after each batch reaches 660 ∘C660\ ^\circ\mathrm{C}660 ∘C.
| Batch | Mass of metal in kg\mathrm{kg}kg | Time for which the temperature remains at 660 ∘C660\ ^\circ\mathrm{C}660 ∘C in min\mathrm{min}min |
|---|---|---|
| A | 0.60 | 8.0 |
| B | 0.90 | not measured |
Explain what happens to the metal and to the energies of its particles during the 8.0 min constant-temperature stage for batch A.
Calculate the time for which the temperature of batch B remains at 660 ∘C660\ ^\circ\mathrm{C}660 ∘C.
Explain your answer.
110 exam-style questions on Edexcel GCSE Physics 14.2 Specific heat capacity and latent heat, covering 14.2.1 Heating, temperature and changes of state, 14.2.2 Specific heat capacity and specific latent heat, 14.2.3 Specific heat capacity calculation, 14.2.4 Specific latent heat calculation, and 14.2.5 Reducing energy transfer through thermal insulation. Each one has a worked solution and a mark scheme showing where the marks go.