What is meant by the specific latent heat of vaporisation of water?
The energy needed to change 1 kg1\ \text{kg}1 kg of ice into water with no change in temperature
The energy needed to change 1 kg1\ \text{kg}1 kg of water into steam with no change in temperature
The energy needed to raise the temperature of 1 kg1\ \text{kg}1 kg of water from 0 ∘C0\ {}^\circ\text{C}0 ∘C to 100 ∘C100\ {}^\circ\text{C}100 ∘C
The energy released when 1 kg1\ \text{kg}1 kg of steam cools by 1 ∘C1\ {}^\circ\text{C}1 ∘C without changing state
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.