Triple Point
| Formula / Notation | Triple point: where solid, liquid, gas coexist; water: 273.16K, 611.7Pa |
|---|---|
| Also Known As | Triple point temperature, three-phase equilibrium point |
What is Triple Point?
The unique combination of temperature and pressure at which all three phases (solid, liquid, and gas) of a substance coexist in equilibrium. The triple point of water (273.16 K, 611.73 Pa) is a fundamental reference point for the Kelvin temperature scale.
Formula & Notation
Other Names / Synonyms: Triple point temperature, three-phase equilibrium point
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The unique combination of temperature and pressure at which all three phases (solid, liquid, and gas) of a substance coexist in equilibrium. The triple point of water (273.16 K, 611.73 Pa) is a fundamental reference point for the Kelvin temperature scale.
The triple point of water was previously used to define the Kelvin temperature scale. Triple point cells are used as primary temperature standards in national metrology institutes. Triple point data helps determine phase boundaries and construct phase diagrams for industrial applications.
Triple point is a physical property concept with no direct safety hazard. However, controlling conditions near triple points is important in processes that require specific phase states.
The formula or notation for Triple Point is: Triple point: where solid, liquid, gas coexist; water: 273.16K, 611.7Pa