Dry ice is solid carbon dioxide used in packing frozen items is an example of molecular solid.
Dry ice and its uses
Dry Ice is the common name for solid carbon dioxide (CO2). It gets this name because it does not melt into a liquid when heated; instead, it changes directly into a gas (a sublimation process). Dry Ice is manufactured by compressing and cooling gaseous CO2 under high pressure to produce liquid CO2 initially. Dry ice is a molecular crystal in which the crystal lattice consists of carbon dioxide molecules rather than individual carbon or oxygen atoms.
- Due to its extremely low temperature of -78°c, dry ice is often used as an alternative to refrigeration for foodstuffs and medical supplies.
- Special dry ice pellets are used for industrial cleaning.