The direct transition from solid to vapor?
Sublimination
The direct transition from solid to vapor is called sublimation. Sublimation occurs when the vapor pressure of a solid equals or exceeds its atmospheric pressure at a particular temperature. When this happens, the solid will evaporate directly into a gas without passing through a liquid phase.
Examples of substances that undergo sublimation include dry ice (solid carbon dioxide), iodine, and camphor. When dry ice is exposed to room temperature, it undergoes sublimation and turns into a gaseous form without first becoming a liquid. Similarly, when iodine crystals are heated, they will sublimate and turn into a purple vapor. Camphor also exhibits sublimation, which is why it can be used to create a mothball-like odor.
Sublimation is an important process in fields such as chemistry and materials science, as it allows for the purification of certain compounds and the creation of new materials with unique properties.
More Answers:
Understanding the Water Cycle: The Vital Process That Sustains Life on EarthUnderstanding the Earth’s Hydrosphere: Oceans, Freshwater, and the Water Cycle
Understanding Deposition: The Science of Water Vapor Transformation into Ice and its Industrial Applications