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An electric motor under steady load draws 9.7 amperes at 110 volts; it delivers 1.25(hp) of mechanical energy. The temperature of the surroundings is 300 K. What is the total rate of entropy generation in W·K−1?

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princessesther2011

Answer:

The total rate of entropy generation is 6.665 W/K

Explanation:

Power input = current × voltage = 9.7 × 110 = 1067 W

Power output = 1.25 hp = 1.25 × 746 = 932.5 W

Total power = 1067 + 932.5 = 1999.5 W

Total rate of entropy generation = total power ÷ temperature of the surrounding = 1999.5 W ÷ 300 K = 6.665 W/K

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