Which process describes the direct change of a substance from the gas phase to the solid phase without passing through the liquid phase?

• A. Evaporation
• B. Deposition
• C. Freezing
• D. Sublimation

Answer: (B)

Verified step by step guidance

1. Understand the phases of matter: solid, liquid, and gas, and the common phase changes between them.
2. Recall that evaporation is the process where a liquid changes to a gas, so it does not describe gas to solid.
3. Freezing is the process where a liquid changes to a solid, so it also does not describe gas to solid.
4. Sublimation is the process where a solid changes directly to a gas without becoming liquid first.
5. Deposition is the reverse of sublimation, where a gas changes directly to a solid without passing through the liquid phase, which matches the description in the problem.