The diagram on the next page shows a refrigerator. In and around a refrigerator, heat is transferred by conduction, by convection, and by evaporation. Decide which process is mainly responsible for the heat transfer in each of the examples listed at the top of the next page.

a. Heat is absorbed as liquid refrigerant changes to vapour in the pipework.

b. Cool air descending from the freezer compartment takes away heat from the food.

c. Heat is lost to the outside air through the cooling fins at the back.

d. Some heat from the kitchen enters the refrigerator through its outer panels.

e. Some heat enters the refrigerator every time the door is opened.

Transcribed Image Text:

refrigerant (vapour) freezer compartment refrigerant (iquid) cooling fins