The vaporization of solid dry ice to gaseous carbon dioxide by heating is an example of?

The process of solid dry ice transitioning directly into gaseous carbon dioxide when heated is a clear example of sublimation. Sublimation is defined as the phase transition of a substance from a solid directly to a gas without passing through the liquid phase. This phenomenon occurs under certain conditions of temperature and pressure, most effectively observed with substances like dry ice, which sublimates at temperatures above -78.5°C.

In contrast, evaporation refers to the transition of a liquid to a gas, which is not applicable in this scenario, as dry ice is a solid at room temperature. Precipitation involves the process where a substance in solution comes out of solution and forms solid particles, which does not relate to the vaporization process described. Condensation is the reverse process, where a gas turns into a liquid, and not relevant to the context of solid dry ice becoming a gas. Thus, the transition of dry ice to carbon dioxide gas exemplifies sublimation as it skips the liquid phase entirely.