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 Form 3 Physics Quantity of Heat Video Questions and Answers

In an experiment to determine the specific latent heat of vaporization of water, steam of mass 10 g at #100^oC# is passed into 100 g of Water initially at #20^oC# in a container of negligible heat capacity. The temperature of the Water rises to #70^oC#. (Take the specific heat capacity of water as #4.2 x 10^3# J/kg/K and the boiling point of water as #100^oC#)
(i) Determine the specific latent heat of vaporization of water. (4 marks)
(ii) State two sources of error in this experiment. (2 mark)
(KCSE 2014 paper 1 question 17c)

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