Are Triple Points and Critical Points Theoretical or Observable in Real Life?

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SUMMARY

Triple points and critical points are observable phenomena in real life, not merely theoretical constructs. The discussion highlights the triple point of water as a clear example, where water exists simultaneously in solid, liquid, and gas phases. This point can be visually represented through phase diagrams, confirming its existence beyond theoretical concepts. Observations of these points validate their significance in understanding phase transitions in various substances.

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  • Understanding of phase diagrams
  • Knowledge of thermodynamics
  • Familiarity with the concept of phase transitions
  • Basic principles of physical chemistry
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  • Research the phase diagram of carbon dioxide and its critical point
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terp.asessed
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I just read an article with a phase diagram, and I am curious if triple point and critical points are SIMPLY theoretical (just in mind) or are they possible in real life (observable in real life)? I understand what they represent, but I am curious.
 
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They are real. If you Google (images) for "triple point of water", those pictures that are not graphs show water at its triple point.
 
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