5. The work output and thermal efficiency of a Carnot heat engine are given. The heat supplied to the heat engine $Q_H$, the heat rejected $Q_L$, and the temperature of the heat sink $T_L$ are to be determined.
$1200^\circ C$
$Q_H$
$\eta_{th} = 40\%$
HE
$500 \text{ kJ}$
$Q_L$
sink