3647 x 2735 px | 30,9 x 23,2 cm | 12,2 x 9,1 inches | 300dpi
Aufnahmedatum:
23. Dezember 2011
Weitere Informationen:
Halite is often used both residentially and municipally for managing ice. Because brine (a solution of water and salt) has a lower freezing point than pure water, putting salt on ice will cause it to melt. Another effect of applying halite to an icy surface covered with water, is that it disrupts the interface in which water molecules are constantly replacing each other from liquid to solid. When NaCl (or other impurities) form a solution with water, part of the interface is blocked, and the crystalline structure of ice emits more water molecules than the liquid water is able to replace. Therefore, the presence of halite in solution with water itself melts ice. It is common for homeowners in cold climates to spread salt on their walkways and driveways after a snow storm to melt the ice. It is not necessary to use so much salt that the ice is completely melted; rather, a small amount of salt will weaken the ice so that it can be easily removed by other means. Also, many cities will spread a mixture of sand and salt on roads during and after a snowstorm to improve traction. Salt is also used extensively in cooking as a flavor enhancer and to cure a wide variety of foods such as bacon and fish.[5] Larger pieces can be ground in a salt mill or dusted over food from a shaker as finishing salt. Salt is also used in the production of ice cream. It is not actually used in the ice cream mixture; rather, it is used to melt the ice surrounding the can holding the ice cream. Melting is an endothermic process, so when the ice melts it absorbs heat from its surroundings to store as latent heat, thus cooling the ice bath and quickening the freezing process.
