What does the triple point on the phase diagram of water represent?

1 Answer
Jun 21, 2016

Answer:

The conditions of temperature and pressure when ALL three phases of water are in equilibrium.

Explanation:

Clearly this is an empirical phenomenon, and also clearly, this represents unusual, non-standard conditions. The phase diagram of water is highly unusual in that the solid-liquid phase boundary has a negative slope. For more information on why this is unusual, see here.