Real Gas PV Curve: Volume Explained

[abcd8989]

http://faculty.wwu.edu/vawter/PhysicsNet/Topics/Thermal/gifs/vdWaalEOS02.gif
After the gas has been liquified, the gas volume should have disappeared. Why the liquid part of the curve still possesses volume?

 

[Integral]

Think about it for a few minutes, please.

 

[abcd8989]

Isn't the volume under consideration the gas volume? When the gas is liquified, there should be no volume...

 

[cjl]

No, the volume under consideration is the complete volume. Liquid still possesses volume, though it is much smaller than the gas volume.