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The phase diagram of water. Density change. Triple points. The ice phases. 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.
8.1 Phase Diagram of Water. 3 phases: solid, liquid, vapour. Triple point: 4.579 Torr (~603Pa), 0.0098oC. phase phase coexistence, 2 phases point – 3 phases. 8.2 Gibbs Phase Rule. Gibbs' phase rule describes the possible # of degrees of freedom (F) in a closed system at equilibrium, in terms of the number of separate phases (P)
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.
12 Ιουλ 2023 · The Phase Diagram of Water. Figure \(\PageIndex{2}\) shows the phase diagram of water and illustrates that the triple point of water occurs at 0.01°C and 0.00604 atm (4.59 mmHg).
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?
Matthew Schwartz Statistical Mechanics, Spring 2019. Lecture 9: Phase Transitions. 1 Introduction. Some phases of matter are familiar from everyday experience: solids, liquids and gases. Solid H2O (ice) melting into liquid H2O (water) is an example of a phase transition.
