MacRoscopic Properties: The World We See

Phases of Matter and Intensive Properties

Why does putting salt on the road help to melt snow?

Like we discussed, when a solute is added to a solution, its freezing point is lowered. When salt is placed on snow, it begins to dissolve into any small amount of water on the ice with which it is in immediate contact. This lowers the freezing point of the surrounding water/ice, causing it to melt into the water. This process continues until the salt is completely dissolved.


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