What process occurs as a solid turns into a gas (and skips the liquid state). For example, when frozen carbon dioxide (dry ice) is heated, it turns into gaseous carbon dioxide.

Answer 1

The process that occurs when a substance transitions directly from a solid to a gas, without passing through the liquid state, is called sublimation. Sublimation happens when the molecules of a solid gain enough energy to break the intermolecular bonds and escape into the gas phase, without going through the intermediate liquid phase. In the case of dry ice (frozen carbon dioxide), when it is heated, it sublimes directly into gaseous carbon dioxide without melting into a liquid.