Question

Refrigerators and freezers works by:

• A. Converting hot air to cold air
• B. Keeping hot air out with cold air pressure
• C. Removing heat from inside themselves
• D. Blowing cold inside them
• E. Producing cold air

Answer 1

The correct option is A Converting hot air to cold air

A gas refrigerant or sometimes air is key to refrigeration in freezers.

The gas refrigerant goes into the compressor and the process of compression makes the gas hot. That hot gas moves through the system getting colder and colder. By the time it reaches the valve – and is pushed through the very small opening – it has turned into a cold mist.
As the mist goes through the coils under the freezer compartment, it starts to evaporate and turn back into a gas. This evaporation process takes the heat from the freezer compartment with it and as the refrigerant starts to warm up, it is sent back to the compressor to start the process all over again. Eventually the process is completed and there is no heat left in the freezer meaning that all objects in the freezer are frozen.