A Carnot heat engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. In 5 minutes of operation of the engine, the heat rejected by the engine melts a mass of ice equal to 4.25×10−2 kg .   Throughout this problem use Lf=3.34×105J/kg for the heat of fusion for water.   A) During this time, how much work W is performed by the engine?   W = ______________ J

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