When naphthalene on heating changes from the solid state directly to the gaseous state it undergoes

Assessment: WAEC SSCE - Chemistry - 1994 (Objective) Subject: Chemistry

Question 1 Report

When naphthalene on heating changes from the solid state directly to the gaseous state it undergoes
Answer Details
When naphthalene changes from the solid state directly to the gaseous state upon heating, it undergoes sublimation. Sublimation is the process in which a solid directly changes into a gas without going through the liquid state. This occurs when the vapor pressure of the solid is greater than the atmospheric pressure. In the case of naphthalene, it has a high vapor pressure at room temperature and atmospheric pressure, which allows it to undergo sublimation when heated.
Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)
Read lesson note on States Of Matter (WAEC)
Read lesson note on Periodic Chemistry (Ghana Only) (WAEC)
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