Heat Questions - GCSE Level

Q17. The diagram shows a fridge with a freezer compartment.

The temperature of the air inside the freezer compartment is –5 °C

(a) The air inside the fridge forms a convection current when the fridge door is closed. Explain why.

[4 marks]

(b) The table below shows information about four fridges.

A householder concludes that the energy used in one year is directly proportional to the volume of the fridge.

Explain why her conclusion is not correct. Use data from the table in your answer.

[2 marks]

Give one advantage and one disadvantage of replacing an old fridge with a new fridge.

Ignore the cost of buying a new fridge.

[2 marks]

(8 marks total)