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3 marksSpecific Latent Heat, l

CSEC Physics · 1993 · Paper 2 · Question 2(iv)

An alternative way of disposing of the waste heat is to use it to evaporate water in the power station. How much water would have to be evaporated EACH second if the latent heat of vaporisation of water is 2.3 x 10^6 J kg^-1?

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Other parts of this question

  1. 2(a)(i)Define 'specific heat capacity'.[2 marks]
  2. 2(a)(ii)Explain what is meant by the term 'efficiency'.[2 marks]
  3. 2(b)(i)State the useful energy changes taking place in an oil-fired power station.[3 marks]
  4. 2(b)(ii)In a power station, thermal energy is wasted at the rate of 660 MW. How many joules of energy are wasted in ONE second?[1 mark]
  5. 2(b)(iii)A nearby river is used to absorb the waste heat. A mass of 6 x 10^4 kg of water passes the power station every second. What is the temperature rise of the…[3 marks]
  6. 2(v)Electricity is produced at 6 600 V a.c. and stepped up to 132 000 V for distribution. State how the potential is raised and give ONE advantage of transmitting…[2 marks]

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