What is the efficiency of an engine that exhausts 440 J of heat to a cold reservoir and receives 570 J of heat from a hot reservoir? *

Question

What is the efficiency of an engine that exhausts 440 J of heat to a cold reservoir and receives 570 J of heat from a hot reservoir? *

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Delwyn 4 years 2021-08-02T19:54:21+00:00 1 Answers 30 views 0

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  1. Euphemia
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    2021-08-02T19:56:06+00:00
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    Answer:

    Efficiency = 77%

    Explanation:

    Input energy = 570 J

    Output energy = 440 J

    To find the efficiency;

    Efficiency = \frac {Out-put \; energy}{In-put \; energy} * 100

    Substituting into the equation, we have;

    Efficiency = \frac {440}{570} * 100

    Efficiency = 0.7719 * 100

    Efficiency = 77.19 ≈ 77%

    Therefore, the efficiency of the engine is 77 percent.

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