High Quality Content by WIKIPEDIA articles! Condensation is the change in the phase of matter from the gaseous phase of an element chemical species into liquid droplets or solid grains of the same element chemical species. Upon the slowing-down of the atoms molecules of the species, the overall attraction forces between these prevail and bring them together at distances comparable to their sizes. Since the condensing atoms molecules suffer from reduced degrees of freedom and ranges of motion, their prior kinetic energy must be lost transferred to an adsorbing colder entity either a center of condensation within the gas volume (colder molecules of the species, cold grains of dust etc.) or some contact surface. Condensation is initiated by the formation of atomic molecular clusters of that species within its gaseous volume like rain drop or snow-flake formation within clouds or at the contact between such gaseous phase and a (solvent) liquid or solid surface. A few distinct reversibility scenarios emerge here with respect to the nature of the surface. Absorption into the surface of a liquid (either of the same species or one of its solvents) — is reversible as evaporation.

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