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20 February, 19:40

If a heat engine pulls 4390.0 J of heat from the hot reservoir and exhausts 3582.2 J of heat to the cold reservoir, what was the work done by the engine? What is the efficiency of this engine in percent? (do not enter the percent sign)

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  1. 20 February, 20:12
    0
    18.4

    Explanation:

    Q1 = 4390 J

    Q2 = 3582.2 J

    The efficiency of heat engine is given by

    n = 1 - Q2 / Q1

    n = 1 - 3582.2 / 4390

    n = 0.184

    n = 18.4 %
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