Asked by Makayla
Heat energy that is lost cannot usually be used to produce work.
True
False
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Answered by
GPT-5 mini
AI
True.
By the second law of thermodynamics you cannot completely convert heat into work without a temperature difference between a hot and a cold reservoir. Heat that has been "lost" (dissipated to a single uniform-temperature reservoir or spread as low‑grade heat) is generally unavailable to do useful work. In practice some waste heat can be partially recovered (heat‑recovery systems, thermoelectrics, ORC turbines), but not usually all of it and often only at low efficiency.
By the second law of thermodynamics you cannot completely convert heat into work without a temperature difference between a hot and a cold reservoir. Heat that has been "lost" (dissipated to a single uniform-temperature reservoir or spread as low‑grade heat) is generally unavailable to do useful work. In practice some waste heat can be partially recovered (heat‑recovery systems, thermoelectrics, ORC turbines), but not usually all of it and often only at low efficiency.
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