An ideal heat engine can have an efficiency of 1 if the temperature of the low temperature reservoir is
A)0 K.
B)0 $\degree$C.
C)0 $\degree$F.
D)0 $\degree$R.
E)the same as the temperature of the heat source.

Question

Quizplus · Accepted Answer

According to the Carnot efficiency formula, the efficiency of a heat engine is given by 1 - (Tc/Th), where Tc is the temperature of the low temperature reservoir and Th is the temperature of the high temperature heat source. As efficiency cannot be greater than 1, Tc must be 0 K (absolute zero) to achieve a Carnot efficiency of 1.

An Ideal Heat Engine Can Have an Efficiency of 1 °\degree°

An Ideal Heat Engine Can Have an Efficiency of 1 $\degree$