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English: Phase diagram of water as a log-lin chart with pressure from 1 Pa to 1 TPa and temperature from 0 K to 650 K, compiled from data in and . Note that the phases of Ice X and XI (hexagonal) differ from the diagram in . Simplified version.
English: Phase diagram of water as a log-lin chart with pressure from 1 Pa to 1 TPa and temperature from 0 K to 660 K, compiled from data in and . Note that the phases of Ice X and XI (hexagonal) differ from the diagram in .
Water phase diagram. Y-axis=Pressure in pascals (10 n). X-axis=Temperature in kelvins. S=Solid; L=Liquid; V=Vapour, CP=Critical Point, TP=Triple Point: Date: September 2006: Source: Own work: Author: Eurico Zimbres: Permission (Reusing this file) Free for all use: Other versions: phase diagram with description but without units of measurement
The simplest phase diagrams are pressure–temperature diagrams of a single simple substance, such as water. The axes correspond to the pressure and temperature. The phase diagram shows, in pressure–temperature space, the lines of equilibrium or phase boundaries between the three phases of solid, liquid, and gas.
English: A modification of File:Phase-diag.svg with an adjusted water solid-liquid coexistence: A typical phase diagram for a single-component material, exhibiting solid, liquid and gaseous phases. The solid green line shows the usual shape of the liquid-solid phase line. The dotted green line shows the anomalous behavior of water.
Extend axis to add supercritical water and use proper negative signs. 05:49, 2 March 2016: 512 × 235 (11 KB) Cmglee: Fix water triple point pressure and label alignment. 00:29, 25 October 2013: 512 × 235 (11 KB) Cmglee
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In water, the critical point occurs at around 647 K (374 °C or 705 °F) and 22.064 MPa. An unusual feature of the water phase diagram is that the solid–liquid phase line (illustrated by the dotted green line) has a negative slope. For most substances, the slope is positive as exemplified by the dark green line.