In thermodynamics, a critical point is the end point of a phase equilibrium curve. One example is the liquid–vapor critical point, the end point of the pressure–temperature curve that designates condi
Subcritical ethane, liquid and gas phase coexist. Critical point (32.17 °C, 48.72 bar), displaying critical opalescence. Supercritical ethane, fluid.
Critical carbon dioxide exuding fog while cooling from supercritical to critical temperature.
Supercritical fluid
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A supercritical fluid is a substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist, but below the pressure required to compress it into a so
Critical point (thermodynamics)
…the pressure–temperature curve that designates conditions under which a liquid and its vapor can coexist. At higher temperatures, the gas comes into a supercritical phase, and so cannot be liquefied by pressure alone. At the critical point, defined by a critical temperature Tc and a critical pressure pc, phase…
Figure 2. Carbon dioxide density-pressure phase diagram
A black smoker, a type of hydrothermal vent