Question about Thermodynamics Laws


Originais Teachy

Thermodynamics Laws


(Originais Teachy 2023) - Question Medium of Physics

A thermal engine operating in cycles has a hot source at a temperature of 800 K and a cold source at a temperature of 400 K, in addition to receiving 2000 J of heat energy in the hot source in each cycle. In the context of the Second Law of Thermodynamics: a) Calculate the maximum efficiency that this thermal engine can achieve, using the efficiency formula involving the temperatures of the hot and cold sources; b) Determine the minimum amount of energy in Joules that must be released in the cold source per operating cycle, assuming that the engine is operating at maximum efficiency; c) Using the concept of the Second Law of Thermodynamics, explain the main difference between a reversible thermal engine and an irreversible thermal engine regarding the heat exchanged between the hot and cold sources.


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