The document shows the phase diagram for water, ice, and steam, displaying the different phases and transitions between solid, liquid, and vapor states over a range of temperatures and pressures. Key points on the diagram include the triple point where ice, water, and vapor can coexist at 0.01 °C and 6.12 millibars, and the critical point above which liquid and vapor phases cannot be distinguished, located at 374 °C and 218 atmospheres. The diagram also maps the melting lines for different crystalline forms of ice that exist at higher pressures.

1. Phase Diagram: Water - Ice - Steam
Critical Point
Triple Point
1.E-07
1.E-06
1.E-05
1.E-04
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
0 100 200 300 400 500 600 700 800
Temperature (K)
Pressure(bar)
Saturation Line
Sublimation Line
Ice I Line
Ice III Line
Ice V Line
Ice VI Line
Ice VII Line
Copyright © 1998 ChemicaLogic Corporation
Vapor
Solid
Liquid
Sublimation Line
Saturation Line
Melting Line
(Ice I)
Melting Line
(Ice III)
Melting Line
(Ice V)
Melting Line
(Ice VI)
Melting Line
(Ice VII)