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26 June, 09:19

A 100-W lightbulb is placed in a cylinder equipped with a moveable piston. The lightbulb is turned on for 0.020 h, and the assembly expands from an initial volume of 0.90 L to a final volume of 5.88 L against an external pressure of 1.0 atm. calculate work done

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  1. 26 June, 09:37
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    Answer: The workdone W = 505J

    Explanation:

    Applying the pressure-volume relationship

    W = - PΔV

    Where negative sign indicates the power is being delivered to the surrounding

    W = - 1.0atm * (5.88 - 0.9) L

    = - 1.0atm * (4.98)

    W = - 4.98 atmL

    Converting to Joules

    1atmL = 101.325J

    -4.98atmL = x joules.

    Work done in J = - 4.98 * 101.325

    W = - 505J

    Therefore the workdone is - 505J
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