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14 October, 04:01

Consider as a system the gas in a vertical cylinder; the cylinder is fitted with a piston onwhich a number of small weights are placed. The initial pressure is 200 kPa, and the initial volume ofthe gas is 0.04 m^3. Let a bunsen burner be placed under the cylinder, and let thevolume of the gas increase 0.1m^3 while the pressure remainsconstant.

A. Calculate the work done by the system during this process.

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  1. 14 October, 04:14
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    Work done = 12,000J = 12KJ

    Explanation:

    This process is an Isobaric one i. e a process at constant pressure

    P = 200KPa = 200 x 1000 Pa = 200,000Pa Vi = 0.04m3 Vf = 0.1m3

    From the formula for Workdone = Integral (PdV)

    Work done = P (Vf - Vi)

    Plugging the values in the equation,

    Work done = 200,000 (0.1 - 0.04)

    Work done = 12,000J = 12KJ
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