What is dry ice? How do you convert it to its original form? Mention the name of the process
involved. What happens to the energy of the matter during this process?
dry ice is frozen carbon dioxide. One unfreezes it by warming, it vaporizes (called sublimation) into gas. Energy is absorbed to vaporize and heat the carbon dioxide.
Dry ice is the solid form of carbon dioxide (CO2). It is called "dry ice" because it does not melt into a liquid when heated, but directly converts into a gas. To convert dry ice back into its original gaseous form, a process called sublimation occurs.
Sublimation is the process by which a solid transitions directly into a gas without passing through the liquid state. In the case of dry ice, when it is exposed to temperatures above -78.5 degrees Celsius (-109.3 degrees Fahrenheit), it sublimates and transforms into carbon dioxide gas.
During sublimation, the energy of the matter is absorbed. Heat energy from the surroundings is used to break the intermolecular bonds holding the solid particles together. As a result, the particles gain enough energy to move from the solid state straight to the gas state, without passing through the liquid phase. This absorption of energy causes the temperature of the surrounding area to drop, making dry ice feel extremely cold to the touch.
In summary, to convert dry ice back into its original form (carbon dioxide gas), you need to expose it to temperatures higher than -78.5 degrees Celsius, and the process involved is called sublimation.