Chinese name
ice cake
Foreign name
ice cake
form
After liquid water freezes,
function
Cool down and drink ice.
classify
Industrial ice, edible ice, dry ice
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Classification, physical properties, medical functions and natural phenomena of ice.
Formation principle
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, and the melting point of ice decreases with the increase of atmospheric pressure.
Classification of ice
Naturally formed ice is called natural ice, and ice usually made by artificial refrigeration is called artificial ice, machine-made ice or industrial ice, among which there are many kinds of artificial ice, and the commonly used ice is industrial ice, edible ice and dry ice.
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, catering, hygiene and industry. 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: also known as crystal ice and clear ice, transparent ice can be used for scenery, artistic sculpture, decoration, celebration ice sculpture, wedding ice sculpture, reception ice sculpture, wine injection ice sculpture, business meeting ice sculpture, Chinese and English font ice sculpture, theme modeling design ice sculpture, logo trademark ice sculpture, ice-breaking ice sculpture, festival ice sculpture, annual ice sculpture, ice sculpture design, as small as wedding ice sculpture.
4. Crushing ice: Crushing ice is to grind large ice cubes into powdery ice with an ice crusher, which is very convenient for seafood preservation without breaking large ice cubes by yourself.
physical features
Ice is a transparent hexagonal crystal structure. 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.
The melting heat of ice is 33 1.6 ~ 335.7 kJ/kg, usually 335 kJ/kg. The specific gravity of ice is related to its temperature, environmental pressure during ice formation, whether there are bubbles in ice and the purity of water. When water freezes, its density decreases and its volume increases. Generally speaking, when the temperature of ice ranges from 0℃ to -20℃, its average specific heat capacity is 2.1kj/kg k, while that of water is 4.2 kj/kg k, which is only half of that of water. The thermal conductivity of ice is related to its temperature and increases with the decrease of temperature.