In fact, dry ice is solid CO2, which has a low temperature of-78℃, and its storage capacity is 1.5 times that of water ice. Because of absorbing heat, it produces white smoke, which sublimates into CO2 gas. It is non-toxic, has no odor and no residue, and has the function of disinfection and sterilization. When it is used in hotels or restaurants to assist in the preparation of food, it will not only change the original flavor of dishes, but also give people a relaxed and happy psychological feeling such as warmth, romance, novelty and being in a fairyland. Therefore, the technology of using dry ice to make food has gradually become a fashion and symbol of high-grade hotels or hotels.

suggestion: dry ice is solid carbon dioxide, so you can't make it by yourself. Compared with oxygen or hydrogen, the use of dry ice makes carbon dioxide more liquefied and solidified. As long as the pressure is increased to 6×1.1×15Pa, carbon dioxide gas can become a colorless liquid. If we continue to cool and pressurize, we can quickly change from a snow-like solid to an ice-like solid.