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Phase diagrams show the preferred physical states of matter at different temperatures and pressure. Within each phase, the material is uniform with respect to its chemical composition and physical state.
Phase Diagram for Water. Water is a unique substance in many ways. One of these special properties is the fact that solid water (ice) is less dense than liquid water just above the freezing point. The phase diagram for water is shown in the figure below.
Since water is a “universal” solvent, water is easily polluted. Water readily dissolves compounds (e.g. heavy metal ions, pesticides), and hard to purify. Water is critical for the three-dimensional structure and activity of proteins, nucleic acids.
Sublimation, Saturation and Melting Lines. Phase Diagram Data and Equations (Excel file) (68 KB. phase_diagram.xls)
Phase Diagrams. Pure substances Phases: uniform with respect to composition and state of aggregation on both microscopic and macroscopic length scale. Solids, liquids and gases. Solids: many different phases (crystal structures) What determines which phase is thermodynamically most stable?
In this study, we report the phase diagram of water calculated at the fully quantum-mechanical level using the “first principles” MB-pol data-driven many-body potential.
The Phase Diagram of Water. Environmental Science, Chemistry, Materials Science. A typical phase diagram consists of discrete regions that represent the different phases exhibited by a substance (Figure \ (\PageIndex {1}\)). Each region corresponds to the range of combinations of temperature and pressure over which that phase is stable.
