During the process of sublimation, a substance transitions from which state directly to gas?

Sublimation is the process in which a substance transitions directly from a solid state to a gas without passing through the liquid phase. This occurs under certain conditions of temperature and pressure. For example, dry ice, which is solid carbon dioxide, sublimates directly to carbon dioxide gas at room temperature and standard atmospheric pressure.

The other states mentioned that are not involved in sublimation include liquid, plasma, and aerosol. Liquids, for example, undergo evaporation or boiling to transition to gas, but they do not contribute to the sublimation process. Plasma is a state of matter consisting of ionized gas and is not directly related to the sublimation process. Furthermore, an aerosol refers to a suspension of fine solid particles or liquid droplets in air or another gas—it is not a distinct state of matter involved in sublimation. Thus, solid is indeed the state that transitions directly to gas during sublimation.