Triple point

From Wikipedia, a free encyclopedia written in simple English for easy reading.

The triple point of water or any substance is the combination of temperature and pressure at which it exists in its solid, liquid, and gaseous state all at once, in equilibrium.

The temperature of the triple point of water is a commonly used physical constant which is used to define temperature scales and calibrate temperature-measuring systems.

By definition, the temperature of the triple point of water is 273.16 K, or 0.01 °C.

This short article needs someone to make it better.
You can help Wikipedia by adding to it.