Question 2
Wrong answer
Score obtained
-25.00 out of
100.00
Mark question
During a thermodynamic cycle, an ideal heat engine absorbs heat $Q_1 > 0$ from a hot source and uses it to perform work $L > 0$, while giving off heat $Q_1 < 0$ to a cold source, with an efficiency of 20%. What is the value of the work performed as a function of $Q_1$?
(a) $L = -Q_1 / 5$
(b) $L = -Q_1 / 4$
(c) $L = 0$
(d) $L = +Q_1 / 5$
(e) $L = +Q_1 / 4$
Wrong answer.
The correct answer is: $L = -Q_1 / 4$
