Question

How does dry ice work?

Answer 1

Hint: Solid form or frozen form of carbon dioxide ($C{{O}_{2}}$) is known as dry ice. The freezing point of the dry ice or solid carbon dioxide is -78 degrees Celsius or -109 degrees Fahrenheit. One of the major properties of dry ice is sublimation.

Complete answer:
When we want to cool something very quickly, we put the thing into ice, but that ice is of a water molecule. This is known as normal ice.
Other than normal ice, there are other substances that are used for cooling purposes like liquid nitrogen, dry ice, etc.
Solid form or frozen form of carbon dioxide ($C{{O}_{2}}$) is known as dry ice. The freezing point of the dry ice or solid carbon dioxide is -78 degrees Celsius or -109 degrees Fahrenheit. One of the major properties of dry ice is sublimation that helps to cool the substance very fast and this is the reason for its working. As the solid carbon dioxide directly converts into gaseous carbon dioxide without forming the liquid form.
So, when the dry ice is placed at a warmer temperature, then it forms a cloud that contains the droplets of carbon dioxide. When we want to parcel something at a cold temperature, it is placed with dry ice instead of normal ice because it would mess up or ruin the thing.

Note:
But the dry ice is not easy to handle because it is very cold and if you touch it bare hands then it can cause severe burns, so whenever you use the dry ice use proper safety gear and equipment.