A steam humidifier converts liquid water into steam to increase humidity in a room.
During a brief period of operation, 6.5 g of boiling water is converted into steam.
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 transferred to change this mass of water into steam. Use the equation:
energy=mass×specific latent heat \text{energy} = \text{mass} \times \text{specific latent heat} energy=mass×specific latent heat37 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.