Cold winter. It often freezes on the road in rainy and snowy weather. Sprinkling some salt on the road can speed up the melting of ice. Tell the truth.

Ice-salt cooling is to use the heat absorption of ice-salt melting process. The heat absorption in the process of melting ice and salt includes two functions: melting ice and melting salt. At first, the ice absorbs heat and melts at 0 degrees Celsius, and the melted water forms a water film on the ice. Then, the salt is dissolved in water and becomes a brine film, and the temperature of the brine film is reduced because it absorbs the heat of the solution. Then, the ice melts further at a lower temperature and exchanges heat with the cooled object through the salt water film on its surface. This process continues until the ice completely melts and forms a uniform salt solution with salt. The low temperature that ice salt can reach is related to the kind of salt and the ratio of salt to water in the mixture.

The most widely used ice salt in industry is the mixture of ice cubes and industrial salt NaCl.