Pure water in nature will freeze at 0℃ under normal atmospheric pressure. If water contains impurities, the freezing point of water will decrease with the increase of pressure. The melting point of ice is the freezing point of water. With the increase of atmospheric pressure, the melting point of ice also increases.
The crystal structure of ice is a transparent hexagonal system. Pure water will freeze at 0℃ under normal atmospheric pressure. If water contains impurities, the freezing point of water will decrease with the increase of pressure, and the melting point of ice is the freezing point of water. With the increase of atmospheric pressure, the melting point of ice will also increase.
Extended data:
Classification:
1. industrial ice: industrial ice is also called ice, ice bars, ice bricks, etc. Ice is frozen with pure tap water, and the temperature is about MINUS 20 degrees. Ice cubes are widely used in seafood, food, industry and food. Each ice cube is 50 cm long, 25 cm wide, 100 cm high and 200 kg net weight.
2. Edible ice: 20 kilograms of edible ice per bag (edible). Sanitary edible ice particles are made by freezing sterilized edible water at MINUS 20 degrees, which can be used for eating, freezing, preparing drinks, mixing wine in hotels and so on. Drinks are cold, so wine and drinks are cold, refreshing, delicious, economical, applicable and delicious.
3. Transparent ice: Transparent ice can be used for landscape, artistic sculpture, decoration, celebration ice sculpture, wedding ice sculpture, wine ice sculpture, business meeting ice sculpture and Chinese and English font ice sculpture.