Dry ice

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Dry ice, sometimes referred to as "Cardice" or as "card ice" is the solid form of carbon dioxide. It is commonly used as a versatile cooling agent because in normal conditions it is about 78.5K colder than frozen water, and a half denser than frozen water. Thus, dry ice carries almost four times the cooling effect as an ice block of the same size. More, whereas ice melts into an oft inconvenient puddle of water, dry ice dissipates into "thin air" of harmless carbon dioxide. Dry ice costs about a dollar a pound (US) versus ten cents a pound for water ice in blocks. So, the convenience of dry ice costs over twice as much as water ice for the same amount of cooling.

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  • 1 Wikipedia - Dry Ice see [1]

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