What is the maximum possible efficiency of an engine operating between the boiling and freezing points of water at sea level?

Question

Quizplus · Accepted Answer

The maximum possible efficiency of an engine is given by the Carnot efficiency, which is 1 - (Tc/Th), where Tc is the cold reservoir temperature and Th is the hot reservoir temperature, both in Kelvin. The boiling point of water is 373K and the freezing point is 273K. Thus, the maximum efficiency = 1 - (273/373) = 0.27 or 27%.

What Is the Maximum Possible Efficiency of an Engine Operating