Sprinkling salt on the ice can melt the ice. What is the principle?

Principle: The freezing point of sodium chloride snowmelt agent dissolved in water (snow) is below zero, that of sodium chloride snowmelt agent dissolved in water is-10℃, and that of salt water is lower than that of water, so it is difficult to form ice cubes after salt is dissolved in snow water. In addition, after the snow melting agent is dissolved in water, the ion concentration in water increases, which makes the liquid vapor pressure of water decrease, while the solid vapor pressure of ice remains unchanged.

Salt absorbs heat when dissolved, and the freezing point of salt solution is below zero, so salt sprinkled on ice will dissolve some ice and freeze again soon. Using this principle, something can be simply embedded in frozen ice.

Extended data:

Salt is the most used anti-skid material, mainly used for deicing and anti-skid. ?

The freezing point of salt water is lower than that of water, so it can remove ice. A small amount of salt water combined with ice and snow can melt the surrounding ice and snow, thus increasing the amount of salt water. This more salt water can melt more ice and snow around, and this process continues until the salt water is diluted to the point where it can no longer melt ice and snow, and then the salt water reaches the freezing point at that time. ?

The purpose of removing ice and snow with salt is to make the ice and snow melt into salt water before reaching freezing point, or to evaporate all the water in it, exposing the black road surface and restoring its function.

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