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According to the phase diagram for water how is the state of water determined?
Wiki User
∙ 10y ago
The axes of any phase diagram have temperature (x-axis) and pressure (y-axis).
With a temperature of 273K and a pressure of 101.325 kPa , water is at its freezing point.
Now keeping the same temperature (273K) , but reducing the pressure to say , 100 Pa ,water will be a gas.
Conversely, at a temperature of 373K and 101,325 kPa water is at its boiling point. However, if you increase the pressure to say 10 MPa, water remains a liquid. If you keep the same temparture 373 K and increase the pressure to 10GPa then water remains a solid.
Another way is to randomly select any given point on the phase diagram, say in the Gas phase and read the temperature and pressure.
lenpollock
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