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Specific Heat Capacity and Latent Heat Questions - GCSE standard

Q2. An electric kettle of thermal capacity 820 J/K contains 0.90 kg of water.

If it takes 9.0 min to raise the temperature of the kettle and its contents from 19°C to 100°C, how much longer should it take to boil away half the water?

(Specific heat capacity of water = 4200 J/kg K

Latent heat of vaporisation of water = 2.3 x 106 J/kg)

(5 marks)