The triple point of a substance is the specific temperature and pressure at which the three phases of that substance—solid, liquid, and gas—can coexist in thermodynamic equilibrium. At this unique point, the solid, liquid, and vapor phases of the substance are in balance, meaning that any change in one phase can lead to the formation or conversion into another phase without altering the overall pressure and temperature.
Triple point by Ciro Santilli 37 Created 2024-06-28 Updated 2025-07-16

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