Difference Between Critical Point And Triple Point

Critical point Triple point
A critical point (or critical state) is the end point of a phase equilibrium . Triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium .
The point at which saturated liquid and saturated vapour lines meet is called the critical point The point at which fusion line and sublimation line and vapourisation meet is called the triple point
It is represented by a point on p-v-T surface It is represented by a point on p-T diagram but appears as a line on p-v-T surface
At critical point there is no distinction between the liquid and vapour phases . below critical point the substances exists in a two phases At triple point all the three phases can coexist together in equilibrium .
An example is example is the liquid-vapor critical point, the end point of the pressure-temperature curve that designates conditions under which a liquid and its vapor can coexist. The triple point of water is defined to take place at 273.16 K, where K is the SI unit Kelvin.

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