A block of ice of mass 0.20 kg at 0 ∘C0\ {}^\circ\text{C}0 ∘C is melted. The water formed is then heated to 25 ∘C25\ {}^\circ\text{C}25 ∘C.
Table
| Quantity | Value |
|---|---|
| Specific latent heat of fusion of ice | 3.34 × 105 J/kg |
| Specific heat capacity of water | 4200 J/kg ∘C4200\ \text{J/kg}\ {}^\circ\text{C}4200 J/kg ∘C |
What is the total energy needed?
2.10×104 J2.10 \times 10^{4}\ \text{J}2.10×104 J
4.58×104 J4.58 \times 10^{4}\ \text{J}4.58×104 J
6.68×104 J6.68 \times 10^{4}\ \text{J}6.68×104 J
8.78×104 J8.78 \times 10^{4}\ \text{J}8.78×104 J
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.