GPT on Question 7, Sep 16
Answer in plain prose only. Do not use bullet points, headers, bold text, or lists. Explain how a refrigerator works.A refrigerator does not create cold; it removes heat from its interior and releases that heat into the surrounding room.
It uses a closed loop of refrigerant, a fluid 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 behind or underneath the refrigerator. There, it releases heat into the room and condenses into 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 food and air. As it absorbs heat, it evaporates back into a gas.
The refrigerant returns to the compressor, and the cycle repeats. A thermostat monitors the interior temperature and switches the compressor on and off as needed. Fans may circulate cold air inside and move warm air away from the condenser coils. The insulated walls and sealed door slow heat from entering, helping the refrigerator maintain a low temperature efficiently.
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