A Sterling engine uses an energy source whose temperature is 727°C and an energy sink whose temperature is 27°C. How much heat must be added to the engine to produce 1 unit of work?

A Sterling engine uses an energy source whose temperature i

1.	A Sterling engine uses an energy source whose temperature is 727°C and an energy sink whose temperature is 27°C. How much heat must be added to the engine to produce 1 unit of work?
A.	1.10
B.	1.19
C.	1.43
D.	2.0
Answer» D. 2.0