Real Gas PV Curve: Volume Explained

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SUMMARY

The discussion centers on the Real Gas PV Curve and the concept of volume in the context of gas liquefaction. It establishes that even after a gas is liquefied, the liquid phase retains volume, albeit significantly smaller than that of the gaseous phase. The volume under consideration is the total volume, which includes both gas and liquid phases, challenging the assumption that liquefaction results in zero volume. This clarification is crucial for understanding thermodynamic properties and phase transitions in real gases.

PREREQUISITES
  • Understanding of the Real Gas Law and PV Curves
  • Familiarity with phase transitions, specifically gas to liquid
  • Basic knowledge of thermodynamics and volume concepts
  • Experience with graphical representations of thermodynamic processes
NEXT STEPS
  • Study the Van der Waals equation and its implications on real gas behavior
  • Explore the concept of critical points in phase diagrams
  • Learn about the thermodynamic properties of liquids and gases
  • Investigate the implications of volume changes during phase transitions
USEFUL FOR

Students and professionals in physics, particularly those studying thermodynamics, as well as engineers and scientists involved in fluid mechanics and phase transition research.

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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?
 
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Think about it for a few minutes, please.
 
Isn't the volume under consideration the gas volume? When the gas is liquified, there should be no volume...
 
No, the volume under consideration is the complete volume. Liquid still possesses volume, though it is much smaller than the gas volume.
 

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