1. The problem statement, all variables and given/known data A heat pump has a coefficient of performance of 3.70 and operates with a power consumption of 6.91 103 W. (a) How much energy does it deliver into a home during 1 h of continuous operation? 9.2x10^7 J (b) How much energy does it extract from the outside air? ? J 2. Relevant equations COP(coefficient of performance) = |Q_h|/W P = W/t W = P*t e = W_eng/|Q_h| = (|Q_h|-|Q_c|)/|Q_h| = 1 - |Q_c|/|Q_h| 3. The attempt at a solution (a) I got this part correct. COP = |Q_h|/W P = W/t W = P*t |Q_h| = COP*W = COP * P*t = 3.70(6.91x10^3 J/s)(3600s) = 9.2x10^7 J (b) I need help on part (b). I can't get the correct answer. I tried using e = 1 - |Q_c|/|Q_h| |Q_c| = |Q_h|(e-1) = 9.2x10^7 J (3.70-1) but that answer doesn't work.