A student compares the burn caused by water at 100 ∘C100\ ^\circ\text{C}100 ∘C with the burn caused by the same mass of steam at 100 ∘C100\ ^\circ\text{C}100 ∘C.
Explain why steam at 100 ∘C100\ ^\circ\text{C}100 ∘C causes a more serious burn than water at 100 ∘C100\ ^\circ\text{C}100 ∘C.
The specific latent heat of vaporisation of water is 2 260 000 J/kg2\,260\,000\ \text{J/kg}2260000 J/kg.
Calculate the energy released when 0.010 kg of steam at 100 ∘C100\ ^\circ\text{C}100 ∘C condenses to water at 100 ∘C100\ ^\circ\text{C}100 ∘C.
40 exam-style questions on AQA GCSE Physics 3.2 Internal energy and energy transfers, covering 3.2.1 Internal energy, 3.2.2 Temperature changes in a system and specific heat capacity, and 3.2.3 Changes of state and specific latent heat. Each one has a worked solution and a mark scheme showing where the marks go.