Steam at 100 ∘C100\ {}^\circ\text{C}100 ∘C causes a more serious burn than the same mass of boiling water at 100 ∘C100\ {}^\circ\text{C}100 ∘C.
Which statement explains this?
Steam is a gas, so it keeps heating the skin after boiling water has cooled
Steam transfers its latent heat to the skin as it condenses, before it cools
Steam particles move faster, so steam has a higher specific heat capacity
Steam is less dense than water, so it spreads over a larger area of skin
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.