The chemical formula of dry ice is CO2.

Dry ice is solid carbon dioxide. Its temperature is minus 78.5 degrees Celsius under normal pressure. Therefore, it will sublimate rapidly at normal temperature and turn into a colorless and odorless gas, that is, carbon dioxide. The density of dry ice is higher than that of ordinary ice, with a density of 1.56kg/L, which is 1.5 times that of ice. Because dry ice becomes larger after sublimation, it is often used for refrigerated transportation, preservation, refrigeration, etc. Dry ice sublimation heat absorption can also be used for stage smoke effects, artificial rain, aviation refrigerated transportation, electricity, environmental protection, etc.

When dry ice is stored and transported for a long time, it should be placed in an insulated box to avoid direct exposure to air. The incubator can effectively prevent dry ice from sublimating too quickly and help slow down the temperature change during dry ice sublimation. When using dry ice, you need to pay attention to safety and avoid contact between dry ice and skin or inhalation of the gas after sublimation of dry ice.

Applications of dry ice:

1. Making drinks and food: Dry ice can be used to make a variety of unique drinks and food. Adding dry ice to wine or beverages can create a foggy visual effect and add interest to the drink. At the same time, dry ice can also be used to make ice cream, salads and other delicacies, adding a unique taste and visual enjoyment to the food.

2. Create stage effects: In stage performances, dry ice is often used to create a mysterious and romantic atmosphere. For example, the white mist formed by sublimation of dry ice can create a fairyland-like effect and add unique charm to the performance.

3. Scientific research and teaching: Dry ice is also widely used in the fields of scientific research and teaching. For example, dry ice can be used to create low-temperature environments to simulate physical and chemical reactions under different temperature conditions. In addition, dry ice can also be used to demonstrate scientific principles such as the three-state changes of matter.

4. Cleaning and cleaning: Dry ice can also be used to perform some cleaning work. For example, dry ice can be used to clean oil, dirt, etc. that are difficult to clean with conventional methods. This is because the shock wave generated by the sublimation of dry ice can shake off the dirt attached to the surface of the object. Dry ice can also be used to clean some inaccessible areas, such as the exterior walls of high-rise buildings, aircraft engines, etc. Since dry ice does not leave any residue after sublimation, it is very convenient to clean.