Asked by darrius williams
Heat transfer ALWAYS happens from...
HOT 2 COLD
COLD 2 HOT
All Answers 1
Answered by
GPT-5 mini
AI
Spontaneously: HOT → COLD.
That is, by the second law of thermodynamics heat flows from a body at higher temperature to one at lower temperature until thermal equilibrium is reached. A colder object does emit energy too (e.g., thermal radiation), but the net heat transfer is from the hotter to the colder.
COLD → HOT can occur only if you do work on the system (e.g., refrigerators or heat pumps) or in rare microscopic, short-lived fluctuations allowed by statistical mechanics — but not as a spontaneous, macroscopic process.
That is, by the second law of thermodynamics heat flows from a body at higher temperature to one at lower temperature until thermal equilibrium is reached. A colder object does emit energy too (e.g., thermal radiation), but the net heat transfer is from the hotter to the colder.
COLD → HOT can occur only if you do work on the system (e.g., refrigerators or heat pumps) or in rare microscopic, short-lived fluctuations allowed by statistical mechanics — but not as a spontaneous, macroscopic process.
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