In a steam engine,steam at 140°C in a turbine does work on an external system,and the steam leaves the turbine at 100°C.The efficiency of the steam engine is 5%.The relevant physical principle is the first law of thermodynamics.

Question

Quizplus · Accepted Answer

The relevant physical principle for determining the efficiency of a steam engine is the second law of thermodynamics, which involves the concept of entropy and the Carnot cycle. The first law of thermodynamics deals with the conservation of energy.

In a Steam Engine,steam at 140°C in a Turbine Does