Quelpr
2 marksTransfer of Thermal Energy

CSEC Physics · May/June 2007 · Paper 2 · Question 3(b)

Only about one-third of the thermal energy generated by burning the gas goes into heating the water, whilst the remainder is wasted. State where the wasted energy goes and give the process by which this wasted heat is transferred.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 3(a)(i)By what process is heat transferred to the water through the kettle?[1 mark]
  2. 3(a)(ii)Explain why kettles are usually shiny on the outside.[1 mark]
  3. 3(a)(iii)How does the cover prevent heat losses?[2 marks]
  4. 3(c)If the mass of water in the kettle is 1.5 kg, calculate the thermal energy required to raise its temperature from 30 °C to 100 °C.[3 marks]
  5. 3(d)How much more energy must the water absorb for 0.2 kg of it to boil off?[3 marks]
  6. 3(e)Explain why it is better not to fill the kettle when making one or two cups of tea.[2 marks]

More practice: the rest of this paper · more Transfer of Thermal Energy questions · all CSEC Physics past papers