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GCSE Combined Science · key term
The energy required to change one kilogram of a substance from liquid to vapour with no change in temperature. The same amount is released when one kilogram condenses.
Used by AQA and Edexcel
Specification 6.3.2.3 · Paper 5
Revise: Specific Latent HeatSpecific latent heat of vaporisation applies to changing a liquid into vapour. The same energy per kilogram is released in the reverse change, condensation.
Paper 5, Paper 6
The energy needed to change 1 kg of a substance from liquid to gas without changing its temperature.
Revise: Heating, specific heat capacity and latent heatSpecific latent heat of fusion applies to melting or freezing; specific latent heat of vaporisation applies to boiling or condensation. Melting and boiling require energy transfers into the substance. Freezing and condensation transfer energy out.
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