Which process describes the direct transition of a solid into a vapor without passing through the liquid phase?

• A. Condensation
• B. Sublimation
• C. Deposition
• D. Melting

Answer: (B)

Verified step by step guidance

1. Identify the phases involved in the process: solid, liquid, and vapor (gas).
2. Understand that the question asks for a direct transition from solid to vapor without becoming liquid first.
3. Recall the definitions of phase changes: melting (solid to liquid), condensation (vapor to liquid), deposition (vapor to solid), and sublimation (solid to vapor).
4. Recognize that sublimation is the process where a solid changes directly into a vapor without passing through the liquid phase.
5. Conclude that the correct term for this process is sublimation.