Answer
$\dot{Q}_H=1110\ kJ/min$
Work Step by Step
$COP_R=\dot{Q}_L/\dot{W}_i$
Given $\dot{Q}_L=750\ kJ/min,\ \dot{W}_i=6\ kW$
$COP=2.08$
$\dot{Q}_H=\dot{W}_e+\dot{Q}_L$
$\dot{Q}_H=1110\ kJ/min$
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