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  2. Physics Demonstrations and Equipment
  3. Thermodynamics
  4. Change of State
  5. Critical Point

Critical Point Concept

Demonstrations in Critical Point

Trans-Sonics Equiphase triple point cell: polished stainless steel cylinder with glass reentrant thermometer well protruding from the top, and blue plastic protective cap shown beside it
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Triple Point Cell

Students observe all three phases of water coexisting in thermodynamic equilibrium at the triple point (273.16 K, 611.657 Pa). Connects phase diagrams to physical reality and demonstrates the Gibbs phase …

Physics Undergraduate Laboratories
Department of Physics
390 UCB
University of Colorado
Boulder, CO 80309

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