GPT on Question 7, Sep 17
Answer in plain prose only. Do not use bullet points, headers, bold text, or lists. Explain how a refrigerator works.A refrigerator keeps food cold by moving heat from inside the cabinet to the surrounding room. It does this with a sealed loop of refrigerant, a substance that easily changes between liquid and gas.
First, a compressor squeezes the refrigerant gas, raising its pressure and temperature. The hot refrigerant then flows through condenser coils, usually located on the back or underneath the refrigerator. As room air carries heat away from these coils, the refrigerant cools and becomes a liquid.
Next, the liquid passes through a narrow expansion valve or capillary tube. Its pressure drops suddenly, making it much colder. The cold refrigerant enters evaporator coils inside the refrigerator, where it absorbs heat from the interior air and evaporates back into a gas. A fan often circulates air across these coils to cool the refrigerator and freezer compartments evenly.
The refrigerant returns to the compressor, and the cycle repeats. A thermostat monitors the internal temperature and switches the compressor on and off as needed. The refrigerator does not create cold; it removes heat from the inside and releases that heat into the room.
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