Energy Transfer Questions - GCSE Level


(a) In winter, energy is transferred from the warm air inside a house to the air outside.

(i) What effect will the energy transferred from the house have on the air outside? (1 mark)
(ii) What would happen to the energy transfer if the temperature inside the house were reduced? Assume the temperature outside the house does not change. (1 mark)

(b) To increase energy efficiency, a householder installs a heat exchanger to an outside wall of the house. The heat exchanger uses heat from the air outside to warm the inside of the house. The diagram shows the idea of the heat exchanger.


(i) Why does the heat exchanger cost money to run? (1 mark)

(ii) The heat exchanger is cost effective in reducing energy consumption. Explain why. (2 marks)

(5 marks total)