Water Phase Diagram Psi. Log 10 p a b t c displaystyle log 10 p a frac b t c where p is equilibrium vapor pressure in k pa and t is temperature in kelvins. Notice one key difference between the general phase diagram and the phase diagram for water.
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At high pressures water has a complex phase diagram with 15 known phases of ice and several triple points including 10 whose coordinates are shown in the diagram. 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 absolute kelvin temperature scale. The phase diagram for water is shown in the figure below.
Notice one key difference between the general phase diagram and the phase diagram for water.
Phase diagram water psi. Select the particular phase transition sublimation melting vaporization triple point from the second drop down menu. Phase diagram for water. Phase behavior for water is represented on a log pressure versus temperature diagram.
