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Difference between Pdv and Vdp (Or) Difference between close system work and open system work


Difference between Pdv and Vdp
(Or) Difference between close system work and open system work


Hello guys,
I was also irritated from these two terms during college time.
These two terms are coming from work done used in the equation of first law of thermodynamics.
dW = F.ds = (p.A).ds = p.(A.ds) = p.dV (close system)
               Here, pressure remains constant while volume changes throughout the process.This equation is valid for a closed system which doesn’t support mass transfer.     
             For example, a piston-cylinder arrangement.
For an open-flow process, the same equation turns out to be 
                        dW=V.dp(opensystem)                                                                                Here volume remains same but pressure changes.
             Fore example,  hydraulic pump
For closed system work, it is area just below the p-V curve up to V-axis. 

Difference between Pdv and Vdp (Or) Difference between close system work and open system work
 For open system work, it is area just left of p-V curve up to p-axis.
Difference between Pdv and Vdp (Or) Difference between close system work and open system work


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