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.
Imagine you're trying to tell apart twins who look exactly alike. At first, they seem different because one always wears red (like a gas) and the other always wears blue (like a liquid). But then, there comes a day (the critical point) when they both wear purple. Now, you can't tell them apart anymore - they've become identical!
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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