Dry ice is solid carbon dioxide (CO2). At room temperature, it bypasses the liquid phase and sublimates, meaning it transitions directly from a solid to a gas. This is why it's called "dry ice" - it doesn't melt into a liquid like regular ice.
Here are some other examples:
* Napthalene: This is a common mothball ingredient. It sublimates at room temperature, meaning it slowly evaporates into the air without melting.
* Iodine: Solid iodine, when heated, will directly turn into a purple vapor.
* Camphor: This is another solid that sublimates, which is why you might notice a strong, pungent odor from camphor balls.
These examples demonstrate the process of sublimation, where a solid transitions directly to a gas.
