How does pressure affect the phase transition from gas to liquid?

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SUMMARY

The discussion centers on the phase transition from gas to liquid under pressure, emphasizing the role of temperature and pressure in this process. It highlights that at temperatures above the triple point but below the critical point, there exists a specific pressure at which gas and liquid can coexist. The behavior of the gas during compression is contingent upon the constraints applied, and the exact phase transition curve varies based on the substance being compressed.

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  • Understanding of unary phase diagrams
  • Knowledge of triple point and critical point concepts
  • Familiarity with gas compression principles
  • Basic thermodynamics related to phase transitions
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  • Research unary phase diagrams and their applications
  • Study the properties of substances at their triple and critical points
  • Explore the effects of temperature and pressure on gas behavior during compression
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If I Press gas to a pressure in which it changes to liquid. What would be temperature of this liquid after?
 
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Unary phase diagram:

http://wikis.lib.ncsu.edu/images/9/9c/CH434_575px-Phase-diag.svg.png

At any temperature higher than the triple point temperature (but below the critical point), there is some pressure at which the gas and liquid will coexist. The exact curve depends on the substance you are compressing.

So if you fix the temperature, you can compress the gas until it liquifies. If you are not holding the temperature fixed, the behavior has to depend on whatever constraints you are imposing.
 

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