A Carnot engine operates between two reservoirs with unknown temperatures. If the Carnot engine operates at $67 \%$ efficiency, what is the ratio of the absolute temperatures of the reservoirs, $T _ { d } T _ { h }$ ?
A) $0.0012$
B) $0.0025$
C) $0.67$
D) $0.33$

Question

Quizplus · Accepted Answer

The efficiency of a Carnot engine is given by $1 - \frac{T_c}{T_h}$. If the efficiency is $67\%$, then $0.67 = 1 - \frac{T_c}{T_h}$, which implies $\frac{T_c}{T_h} = 0.33$.

A Carnot Engine Operates Between Two Reservoirs with Unknown Temperatures 67%67 \%67%

A Carnot Engine Operates Between Two Reservoirs with Unknown Temperatures $67 \%$