Phase Diagram

How it works

A **schematic** pressure–temperature diagram: solid, liquid, gas, and **supercritical** regions are separated by **fusion** (melting), **vaporization** (boiling), and **sublimation** curves meeting at a **triple point**. The dashed curves are guides; coordinates **T̂**, **P̂** are normalized for teaching, not experimental water data. Drag the sliders to move the yellow dot and read off the phase.

Key equations