A Carnot heat engine uses a hot reservoir consisting of a large amount of boilin

Question

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 4.85×102 kg .

Throughout this problem use Lf=3.34×105J/kg for the heat of fusion for water.

Melting lce with a Carnot Engine Part A A Carnot heat engine uses a hot reservoin 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 4.85x10-2 k During this time, how much work W is performed by the engine? Hints Throughout this problem use = 3.34 x 105 J/kg for the heat of fusion for water F-2752.751 wa Submit My Answers Give Up

Explanation / Answer

heat rejected by the engine = m *Lf = 4.85*10-2 * 3.34 *105 = 16.2 *103 j

Th = 373 k

Tc = 273K

and we know Tc / Th    = Qc /Qh

Qh = (373/273 )16.2 *103 = 22.13*103 j

W = Qh - Qc = 5.93 *103 J

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