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Triple point. A typical phase diagram. The solid green line applies to most substances; the dashed green line gives the anomalous behavior of water. In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium. [1]
In chemistry and physics, the triple point is the temperature and pressure at which solid, liquid, and vapor phases of a particular substance coexist in equilibrium. It is a specific case of thermodynamic phase equilibrium. The term "triple point" was coined by James Thomson in 1873.
11 wrz 2022 · The triple point is the temperature and pressure at which three states of matter exist in equilibrium. The critical point is also a combination of temperature and pressure, but it is the end point of a phase equilibrium curve where a liquid and its vapor can coexist.
27 maj 2024 · The triple point of a substance is the specific temperature and pressure at which its solid, liquid, and gas phases coexist in equilibrium. This point is unique to each substance and is a critical aspect of its phase diagram, which is a graphical representation of the conditions under which distinct phases occur and coexist.
12 lip 2023 · Far more reproducible than the melting point of ice, which depends on the amount of dissolved air and the atmospheric pressure, the triple point (273.16 K) is used to define the absolute (Kelvin) temperature scale.
The triple point is a key feature on a phase diagram as it marks the unique conditions where solid, liquid, and gas phases coexist. By identifying this point on the diagram, one can easily understand the relationships and transitions between different phases under varying temperatures and pressures.
Definition. The triple point is the unique set of conditions at which a substance can coexist in three phases: solid, liquid, and gas. At this specific temperature and pressure, all three phases are in equilibrium, making it a critical concept in understanding phase changes and latent heat.
