Answer
D
Work Step by Step
$COP_R=Q_L/W_i,\ COP=1.4,\ W_i=680\ kWh$
$Q_L=3427.2\times10^3\ kJ/year$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.