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Do you know why salt is spilled when snow blocks roads?

Heavy snowfall has brought about a blockage of vehicle traffic. Roads are blocked, and maintenance companies have found the ideal solution. But do you know why salt is used to unlock snow roads? It is worth noting that salt causes the ice to melt. This is because when salt is added to ice, it is put into contact with the thin layer of water on the surface.

When ice and water are in contact, there is an exchange between two different states of water, liquid and solid. Some of the ice molecules break off and pass into water, and the opposite happens with water molecules. After the salt is melted in water, the number of water molecules adhering to the ice increases rapidly.

This contact lowers the melting temperature (point) below normal. Consequently, the ice in contact with the salt dissolves and thus creates another layer of water starting the cycle from the beginning. The more concentrated the salt, the lower the freezing temperature of the ice.

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