Dry ice is often used to cool down. What's the temperature of dry ice?

Dry ice is often used to cool down. What's the temperature of dry ice?

Dry ice is solid carbon dioxide, so it is the principle of reducing indoor temperature. The surface temperature of dry ice reaches -78℃. With the sublimation of dry ice, it will absorb the heat of the surrounding environment and exert the freezing effect. Compared with ordinary ice (0), the volume of dry ice is half that of ordinary ice, but its cooling effect is 3.3 times that of ordinary ice. In the process of melting, dry ice gradually turns into gas and sublimates into the air. Before it disappears completely, it will not have any impact on the surrounding environment, will not pollute the environment, and has a bactericidal effect, which is incomparable to ordinary ice cubes. Dry ice has a wide range of uses: it is suitable for the preservation, storage and transportation of fresh food, aquatic products and meat processing; Low temperature treatment and freezing of biopharmaceuticals; Coordination of cold sets of industrial metal parts: when planting flowers and vegetables in greenhouse, carbon dioxide fertilizer can be put in regularly and quantitatively to create the cloud effect of stage and film, which is widely used in literary and art circles; Hotels and restaurants use dry ice for cooking, creating a festive atmosphere and upgrading banquets such as lobster sashimi and fruit platter.

Dry ice is another form of carbon dioxide, which is acidic and generally only used in industry. If it is placed at home, it is very acidic, and volatilization will corrode the walls, and the indoor air will become acidic and harmful to the human body. Dry ice becomes refrigerant, which mainly uses heat absorption and is physical. Dry ice is solid carbon dioxide, and dry ice is solid carbon dioxide, which is very volatile. Volatilization will take away a lot of heat, so it can be used for refrigeration. I use dry ice as refrigerant. And the "white fog" in the stage effect is also caused by dry ice.

Dry ice is solid carbon dioxide, which condenses into colorless liquid under the pressure of 6250.5498kpa, and rapidly solidifies under low pressure, so it is very easy to sublimate. Cooling in summer is a good choice, but it is not. It is dangerous to cool with dry ice. We know that the substance of dry ice is carbon dioxide, so it is easy to sublimate when the temperature is above 30 degrees in summer. The carbon dioxide concentration of dry ice reaches 99.9%, and there will be less oxygen around it. On the other hand, there is more carbon dioxide, and it is easy to suffocate when it is higher than oxygen, so dry ice cannot be used to cool down. If you want to be cool, please open the window for ventilation.