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Critical Point

Definition

The critical point in thermodynamics is the temperature and pressure at which the gas and liquid states of a substance become identical and form one phase.

Related terms

Phase Transition: This is the process of changing from one state of matter to another, like from solid to liquid or liquid to gas.

Triple Point: This is the specific temperature and pressure where all three phases (solid, liquid, and gas) of a substance coexist in equilibrium.

Critical Temperature: This is the highest temperature at which a pure substance can exist as a liquid.

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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.