A Level Specific Heat Capacity Questions


(a) Calculate the energy released when 1.5 kg of water at 18 °C cools to 0 °C and then freezes to form ice, also at 0 °C.

specific heat capacity of water = 4200 J kg-1 K-1

specific latent heat of fusion of ice = 3.4 × 105 J kg-1

(4 marks)

(b) Explain why it is more effective to cool cans of drinks by placing them in a bucket full of melting ice rather than in a bucket of water at an initial temperature of 0 °C.

(2 marks)

(Total 6 marks)