Question

Salt is spread on pavement snow during winter in cold countries.Why?

Answer 1

The biggest reason for pouring salt on icy roads is that salt lowers the freezing point of water. Water normally freezes at 32 degrees Fahrenheit, but when you add salt, that threshold drops to 20 degrees (or even 2 degrees) Fahrenheit.

And no, there really is no difference between the salt on the road and the stuff on your kitchen table. The only difference is the size. The salt on the roads has crystallized in larger pieces, while normal table salt has been crushed into tiny grains.

Answer 2

The reason why salt is spread on pavement snow during winter in cold countries is because this practice lowers the freezing point of the water that forms the ice which makes the ice melt and prevents snow to collect on the pavements.

Hope this helps