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3 marksSpecific Latent Heat, l

CSEC Physics · May/June 2008 · Paper 2 · Question 6(c)

What mass of perspiration would remove the same quantity of heat as the urine in Part (b), when completely evaporated from the skin? Assume that evaporation is equivalent to a change of phase from liquid to vapour without an increase in temperature. [Specific latent heat of vapourisation of water = 2.3 x 10⁶ J kg⁻¹]

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  1. 6(a)The method of mixtures is used to determine the specific heat capacity of liquids and solids by experiment. Describe the procedure, the measurements to be…[6 marks]
  2. 6(b)Find the amount of heat removed each day by the quantity of urine. [Assume the specific heat capacity of urine = specific heat capacity of water = 4200 J kg⁻¹…[6 marks]

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