What is true of the maximum possible efficiency of a heat engine?

A. It is 100%.


B. It depends on the difference between the exhaust and intake temperatures.


C. It depends on the ratio between the exhaust and intake temperatures.


D. It depends on the intake temperature.What is true of the maximum possible efficiency of a heat engine?
A heat engine can never be 100% efficent. The equation for efficiency is 1-Tl/Th





Or Th-Tl/Th





Tl= Temp low


Th=Temp high





Hope this gives you enough information to make the right decision.What is true of the maximum possible efficiency of a heat engine?
It's not A, as that would violate the 2nd law of thermodynamics. Assuming it's a simple engine, it's probably C, but don't quote me on that. My undergrad thermo is a bit rusty.
C





Doug