Which of the following correctly explains why iodine crystals change directly into the gaseous state when heated?

Assessment: WAEC SSCE - Chemistry - 1988 (Objective) Subject: Chemistry

Question 1 Report

Which of the following correctly explains why iodine crystals change directly into the gaseous state when heated?
Answer Details
Iodine crystals change directly into the gaseous state when heated because of a process called sublimation. Sublimation occurs when a solid transitions directly into a gas without first becoming a liquid. Iodine molecules are held together by weak intermolecular forces, which makes it easier for them to break apart and turn into a gas when heated. This process is called sublimation and it explains why iodine crystals can change directly into a gaseous state when heated.
Read lesson note on Solubility (JAMB)
Read lesson note on Rates Of Chemical Reaction (JAMB)
Read lesson note on Electrolysis (JAMB)
Read lesson note on Environmental Pollution (JAMB)
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