GPT on Question 7, Sep 25
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 not create cold; it removes heat using a circulating refrigerant.
The process begins in the evaporator coils inside the refrigerator. Liquid refrigerant enters these coils at low pressure and evaporates, absorbing heat from the air and food inside. A fan circulates the cooled air throughout the compartments.
The refrigerant, now a gas, flows to a compressor. The compressor squeezes it, raising its pressure and temperature. This hot, high-pressure gas then passes through condenser coils, usually located on the back or underneath the refrigerator. Heat escapes from the coils into the room, causing the refrigerant to condense back into a liquid.
The liquid then passes through an expansion valve or narrow tube, which sharply lowers its pressure and temperature. It returns to the evaporator coils, where the cycle repeats. A thermostat monitors the internal temperature and turns the compressor on and off as needed. Insulation and tight door seals slow the entry of heat from the room, helping the refrigerator stay cold efficiently.
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