Ice cream moon cakes are actually ice cream moon cakes, and the fillings inside are made of ice cream. It is obvious that ice cream will melt even at room temperature in winter, so this problem must be considered when buying ice cream moon cakes.
Extended data:
Fresh-keeping Snow Moon Cake Treated with Dry Ice
Yesterday, the reporter visited a number of supermarkets, cake shops and cake shops, and found that anyone selling ice cream moon cakes would give some dry ice to keep the temperature low and prevent the moon cakes from melting.
The reporter observed that few merchants would remind consumers how to deal with used dry ice. In a famous brand ice cream shop at the railway station, the service staff only said that they would give away dry ice that could be "kept warm" for one hour. When the reporter asked what to do with dry ice when she bought it home, she replied, "Just throw it away." There is not much explanation.
In fact, it's not just ice cream moon cakes. Now many foods are frozen with dry ice. A few days ago, Ms. Chen received seafood from a friend in Dongshan, which contained a bag of ice cubes. "The heat insulation effect is quite good. It was sent home by express, and it was intact for six or seven hours. " After receiving the seafood, Ms. Chen put the seafood and dry ice together in the refrigerator.
Ms. Chen was quite puzzled when she heard the reporter remind that "dry ice can't be put in the refrigerator". "It can be frozen anyway, why can't it be put in?" The reporter asked Xu Chenglong, a physics teacher at Shuangshi Middle School, about the principle of dry ice explosion.
He introduced that dry ice is actually solid carbon dioxide, the temperature is below MINUS 78.6℃, it is colorless, odorless and nontoxic, and it will absorb a lot of heat when sublimating, so it is a good material for refrigeration and low-temperature maintenance. However, because the freezing point of dry ice is-78.6℃, it means that it is very volatile in the real environment and sublimates into gaseous carbon dioxide 600 to 800 times larger than the solid volume.
In a refrigerator or even an ice bottle, dry ice will be sublimated into gas due to high temperature, and once the gas in a closed space is greatly increased, resulting in greater pressure, a physical explosion will occur.