Question

What is dry ice? How it is stored? Write its function.

Answer 1

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 (This process is known as sublimation). As Irelands premier dry ice specialist, Polar Ice provides dry ice solutions for a diverse range of customers, in areas such as:

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Place the dry ice into your container and then in refrigerator

and
It is stored under high pressure. Solid CO2 gets directly converted to gaseous state on decrease of pressure to 1 atmosphere without coming into liquid state. 

or


The dry ice is actually the gaseous carbon dioxide (CO2 ), which is prepared by  first pressurizing and refrigerating to form liquid CO2 , which is then allowed to expand in an atmospheric chamber.

 When CO2 converts from liquid CO2 to gas, there is an extreme drop in temperature which causes some of the gas to freeze, yielding both snow-like CO2 and vapor of CO2. 

The “snow CO2” is then hydraulically pressed into dry ice blocks and pellets. 

Answer 2

Explanation:

Dry ice is solid carbon dioxide. Dry ice is made from carbon dioxide gas. The carbon dioxide gas is pressurized and cooled to form liquid carbon dioxide. The liquid carbon dioxide is injected into either block press or pelletizer. These dry ice production machines have Chambers which once released to atmospheric pressure the liquid carbon dioxide converts to dry ice snow and carbon dioxide gas.