Critical Pressure of Water
At pressure, that is higher than the critical pressure, water is in special state, that is known as supercritical fluid state. A supercritical fluid is a fluid that is at pressures higher than its thermodynamic critical values. At the critical and supercritical pressures a fluid is considered as a single-phase substance in spite of the fact that all thermophysical properties undergo significant changes within the critical and pseudocritical regions.
For water, the critical parameters are the following:
- Pcr = 22.09 MPa
- Tcr = 374.14 °C (or 647.3 K)
- vcr = 0.003155 m3/kg
- uf = ug = 2014 kJ/kg
- hf = hg = 2084 kJ/kg
- sf = sg =4.406 kJ/kg K
See also: Critical Point of Water
See also: Supercritical Fluid
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