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A phase diagram is a graphical representation of the various phases of a substance or mixture of substances that coexist in thermodynamic equilibrium, and undergo phase changes under different working conditions, such as temperature, pressure, or volume. The water system is divided into three phases: ICE (S), WATER (L), and WATER VAPOUR (G)
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.
We can use the phase diagram to identify the state where water exists under specific temperature and pressure conditions. For example, water is ice at 50 kPa and – 10 o C. Water is unique compared to other substances.
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).
Learning Objectives. Describe the phase diagram for water. Define critical temperature. Define critical pressure. Examples. How is it possible to create snowballs? You need a special snow to make the best snowballs. This snow needs to be a little wet so the particles will stick together.
Phase diagrams show the preferred physical states of matter at different thermodynamic variables, such as temperatures and pressure. Within each phase, the material is uniform with respect to its chemical composition and physical state.
12 Απρ 2023 · The Phase Diagram of Water. Figure 11.7.2 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). Far more reproducible than the melting point of ice, which depends on the amount of dissolved air and the atmospheric pressure, the triple point (273.16 K) is used to define the ...
