Answer
(a) $Q_H = 6.43 \times 10^5 J$
(b) $Q_C = 4.63 \times 10^5 J$
Work Step by Step
(a) For one second,
$ W = 180 \times 10^3 J$
$Q_H = \frac{W}{\epsilon}$
$Q_H = \frac{180 \times 10^3 J}{0.280 }$
$Q_H = 6.43 \times 10^5 J$
(b) $𝑄_𝐶 = 𝑄_𝐻 - W$
$𝑄_𝐶 = 6.43 \times 10^5 J - 180 \times 10^3 J $
$Q_C = 4.63 \times 10^5 J$