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3 marksSpecific Latent Heat, l

CSEC Physics · May/June 2006 · Paper 2 · Question 1(f)

Water boils at 100°C. Calculate the heat energy which must be supplied in order to completely convert the 2 kg of water to steam. [Specific latent heat of vaporization of water = 2.3 x 10⁶ Jkg⁻¹]

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  1. 1(a)Complete the table above.[3 marks]
  2. 1(b)Plot on the graph page opposite a graph of energy supplied against temperature change.[11 marks]
  3. 1(c)Calculate the gradient of the graph.[6 marks]
  4. 1(d)Assuming that the energy loss to the container and the surroundings is negligible, what physical quantity does this gradient represent?[1 mark]
  5. 1(e)Determine the value of this quantity if 1 kg of water were used and state the physical quantity this represents.[2 marks]
  6. 1(g)Distinguish between boiling and evaporation.[4 marks]

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