An astrophysicist uses liquid nitrogen to cool an infrared detector.
Calculate the thermal energy absorbed when 140.0 g of liquid nitrogen vaporises to gas at its boiling point.
The specific latent heat of vaporisation of nitrogen, LLL, is 1.99 × 105 J/kg.
Use the equation:
E=m×L E = m \times L E=m×L36 exam-style questions on Edexcel GCSE Physics 14.2 Specific heat capacity and latent heat. Each one has a worked solution and a mark scheme showing where the marks go.