triple point

noun

, Physics.

1. the particular temperature and pressure at which the solid, liquid, and gaseous phases of a given substance are all at equilibrium with one another.

triple point

noun

1. chem the temperature and pressure at which the three phases of a substance are in equilibrium. The triple point of water, 273.16 K at a pressure of 611.2 Pa, is the basis of the definition of the kelvin

triple point

1. The temperature and pressure at which a substance can exist in equilibrium in the liquid, solid, and gaseous states. The triple point of pure water is at 0.01°C (273.16K, 32.01°F) and 4.58 mm (611.2Pa) of mercury and is used to calibrate thermometers.
2. Compare critical point

triple point

1. In physics , the temperature at which all three phases of matter ( solid , liquid , and gas ) for a given substance can coexist.

Notes

The triple point for water is a little above the freezing point , and is used to define temperature scales .

Word History and Origins

Origin of triple point¹

First recorded in 1870–75

Example Sentences

The limiting temperature for these two cases, at which the division into three phases may occur, is called the triple point.

From Project Gutenberg

It is possible, too, that long before the triple point is reached the whole liquid will have evaporated.

From Project Gutenberg

Its shape is so regularly three-cornered, that Triangle or Triple-point (Trinacria) was one of its ancient names.

From Project Gutenberg

We shall, in the first place, consider only the triple point S-L-V.

From Project Gutenberg

As to the general arrangement of the three univariant curves around the triple point, the following rules may be given.

From Project Gutenberg