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RossNaphthalene undergoes a unique phase change called sublimation, where it changes directly from a solid to a gas without passing through the liquid phase. This property makes naphthalene useful for applications such as mothball production and as a sublimation dye in the laboratory.
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Does naphthalene decompose when gently heated?
Yes, naphthalene sublimes and undergoes vaporization at temperatures above 80 degrees Celsius rather than decomposing directly. At temperatures exceeding its sublimation point, naphthalene converts from a solid to a gas without passing through a liquid phase.
Explain why naphthalene or moth balls disappear without wetting the clothes?
Naphthalene (moth balls) sublimes, which means it transitions from a solid to a gas without going through a liquid phase. This process occurs due to the substance's high vapor pressure at room temperature, causing it to evaporate directly into the air. As a result, naphthalene can disappear from clothes without leaving any visible residue.
Why naphthalene undergoes sublimation but has melting point?
Naphthalene undergoes sublimation because it has weak intermolecular forces that allow it to transition directly from solid to gas phase without melting first. However, naphthalene can still have a melting point due to the presence of a crystal lattice structure that requires enough energy to break to form a liquid.
What characteristics do sublimation have?
Sublimation is a phase transition where a substance goes directly from a solid to a gas without passing through the liquid phase. It occurs under specific temperature and pressure conditions, and is a reversible process. Sublimation is commonly observed in substances like dry ice (solid carbon dioxide) and mothballs (naphthalene).
What is the phase change in a boiling point?
What is the phase change in evaporation
