A reverse Carnot engine is used for the heating of a building. The building receives (209 mathrm{~kJ}
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A reverse Carnot engine is used for the heating of a building. The building receives \(209 \mathrm{~kJ} / \mathrm{h}\) of heat at \(20^{\circ} \mathrm{C}\) from a heat pump. The outside air temperature is \(-5^{\circ} \mathrm{C}\). Calculate
(a) heat taken from outside air per hour, and
(b) power of motor required
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