Enthalpy-Entropy Diagram for Water

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This Demonstration shows an enthalpy-entropy (-) diagram for water. Use the checkboxes to display lines of constant pressure (purple), temperature (green) or vapor quality (blue). Check "phase envelope" to show saturated liquid (magenta), saturated vapor (orange line) and the critical point (black dot). You can also show the grid lines.

Contributed by: Rachael L. Baumann (February 2017)
Additional contributions by: John L. Falconer
(University of Colorado Boulder, Department of Chemical and Biological Engineering)
Open content licensed under CC BY-NC-SA



- diagrams are useful for showing reversible and irreversible adiabatic compression (or expansion) processes, as shown in the screencast video at [1].


[1] Adiabatic Compression/Expansion: Enthalpy-Entropy Diagram [Video]. (Feb 17, 2017) www.youtube.com/watch?v=HFm9cyq-jXg.

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