Enthalpy-Entropy Diagram for Water
This Demonstration shows an enthalpy-entropy (H-S) diagram for water. Use the checkboxes to display lines of constant pressure P (purple), temperature T (green) or vapor quality q (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.

Download the CDF file to view the simulation using the free Wolfram CDF player.