GPT on Question 7, Sep 19
Answer in plain prose only. Do not use bullet points, headers, bold text, or lists. Explain how a refrigerator works.A refrigerator removes heat from its interior and releases that heat into the surrounding room. It does this with a sealed loop containing a refrigerant, a fluid that can easily change between liquid and gas.
Inside the refrigerator, the refrigerant passes through an evaporator coil at low pressure. It evaporates there, absorbing heat from the food and air inside the compartment. A compressor then pulls in the refrigerant gas and compresses it, raising its pressure and temperature.
The hot, high-pressure refrigerant flows through condenser coils, usually located on the back or underneath the refrigerator. As room air carries away the heat, the refrigerant condenses into a liquid. It then passes through a narrow expansion device, which sharply lowers its pressure and temperature. The cold refrigerant returns to the evaporator, and the cycle repeats.
A thermostat monitors the interior temperature and switches the compressor on and off as needed. Insulation and tight door seals slow the flow of heat from the room into the refrigerator, helping it stay cold efficiently. A freezer works by the same process but is maintained at a lower temperature.
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