Question

what is critical pressure??
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Answer 1

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CRITICAL PRESSURE:-

It is the minimum pressure up to which liquid can exist.

Below crirical pressure ,no liquification can be achieved.

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Answer 2

The pressure of a gas or vapour in its critical state is called critical pressure. In thermodynamics, a critical point is the end point of a phase equilibrium curve. The most prominent 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