Question

Use the concept of entropy and the 2nd Law of Thermodynamics to explain why any real heat engine must waste heat energy by expelling it into a low temperature environment or low temperature heat reservoir.

could you please explain this in easiest way

Answer 1

raleat Hot G second law of thermodynamics statement - It is impossible to construct an engine which, operating in acycle, will produce no other effelt them the extraction of heat from a reservoir and performance of an equivale amount of work. We have efficiency of an heat engine is st. 2 (1-2)x100 IT Ir indicates that the efficiency in will always be less them unity. But why? Is it due to cold reservoir irreversibility of the thermal process? Yes. It is desirable to device a wat engine that would deliver maximum efficiency. sadi cannot vollgrised that for maximum efficiency, a wat engine should be thermodynamically reversible. But in real case that's impossible.