What Is pdV Work
Consider a System Consisting of a Gas in a Cylinder Fitted with a Piston. During the Initial Condition of the Piston I. E. , When the Piston Is at Position...
Consider a system consisting of a gas in a cylinder fitted with a piston. During the initial condition of the piston i.e., when the piston is at position (1), the pressure inside the cylinder is P1 and volume is V1. Then the pressure falls to P2 and volume will increase to V2. …
What is meant by displacement work?
=pA ´dx. =pdV. where dV – change in volume. This work is known as displacement work or pdV work corresponding to the elemental displacement dx. To obtain the total work done in a process, this elemental work must be added from the initial state to the final state.
Why is work pdV and not VdP?
Pdv is used when there is “dv”, ie change in volume while P is a function of volume. This typically happens in a non flow process. On the other hand VdP is used when there is “dP”, ie change in pressure. This happens during a flow process (since difference in head causes flow ).
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