Chemistry / Unit 8 Chem 1404 short lesson, about 20 seconds
Vaporization, Condensation, and Dynamic Equilibrium
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The idea
In a closed container, a liquid reaches dynamic equilibrium with its vapor when molecules leave and rejoin the liquid at equal rates.
In practice
A sealed jar of water reaches steady vapor pressure, though individual molecules keep evaporating and condensing without pause.
Where people slip
Equilibrium means the rates match, not that the process stopped — molecules keep moving between phases throughout.
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