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# Form 3 Physics Quantity of Heat Video Questions and Answers

(a) Define specific latent heat of fusion of a substance (1 mark) (b) Water of mass 200 g at a temperature of 60^0C is put well lagged copper calorimeter of mass 80g. A piece of ice at 0^0 C and mass 20 g is placed in the calorimeter and the mixture stirred gently until all the ice melts. The final temperature, T of the mixture is then measured.
Determine
(i) The heat absorbed by the melting ice at 0^0 C. (2 marks)
(ii) The heat absorbed by the melted ice (water) to rise to temperature T (Answer may be given in terms of T) (2 marks)
(iii) The heat lost by the warm water and the calorimeter (2 marks) (Answer may be given in terms of T) (2 mark) (iv) The final temperature T of the mixture
(Specific latent heat of fusion of ice = 334 000 J kg^-1 (Specific heat capacity of water = 4 200 Jkg-1 k^-1 Specific heat capacity of copper = 900 J kg^-1)

(11m 20s)
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