Grade 12Thermal Physics

If process is reversible then area under PV graph gives work done but if process is Irreversible area below PV graph give work done .why?

Yash Pandey

8 Years agoGrade 12

1 Answer

Eshan

8 Years ago

Dear student,

It does not matter if a process is reversible or irreversible. This relation $dW=PdV$ is general because it is derived for any compression under some applied pressure as-

$dW=F.ds=(PA).ds=P(AdS)=PdV$

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If process is reversible then area under PV graph gives work done but if process is Irreversible area below PV graph give work done .why?

Yash Pandey

1 Answer

Eshan

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