7. Compare sublimation and condensation.
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Condensation: the substance changes from a gas to a liquid. ... Sublimation: the substance changes directly from a solid to a gas without going through the liquid phase.
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When a substance in a gaseous state gets converted into liquid state on cooling, for example, water vapor (gas) present in air gets condensed to water droplets (liquid) on coming in contact with cold surface such as walls of a tumbler containing ice, then the process is known as condensation.
A change of state directly from solid to gas without changing into liquid state is called sublimation. For example, when ammonium chloride is heated, it changes directly from the solid state into the gaseous state. Similarly naphthalene balls, dry ice also undergo sublimation.
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