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The work done by a weightless piston in ...

The work done by a weightless piston in causing an expansing `Delta V` (at constant temperature), when the opposing pressure P is variable, is given by :

A

`W=-intPDeltaV`

B

`W=0`

C

`W=-PDeltaV`

D

None

Text Solution

Verified by Experts

The correct Answer is:
A
`W_rev=int PdV or int PDeltaV ` : Note that opposing pressure is not constant throughout.
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