# How do you read the phase diagram of water?

Typically, pressure is plotted against temperature, and here we examine the phase of the water under different conditions of temperature and pressure. Of course, we can draw the ordinate $P = 1 \cdot a t m$, and we can see the phase transitions of water at $1 \cdot a t m$, i.e. at $0$ ""^@C and $100$ ""^@C.
Depicted on the graph are the $\text{triple point}$, the conditions of temperature and pressure at which all 3 phases are in equilibrium, and the $\text{critical point}$, the conditions of temperature and pressure at which the densities of the liquid phase, and gaseous phase become equal, and you can no longer distinguish between the 2 phases. Clearly, these $\text{critical points}$ are at highly non-standard conditions of temperature and pressure.