Why should we sprinkle salt on the road after the heavy snow? His scientific theory is original.

Because salt can accelerate the melting of snow. After salt is dissolved in water, its freezing point is-10℃. In addition to absorbing heat, the freezing point of salt water is low, so it is difficult to form ice cubes after salt is dissolved in snow water. After being dissolved in water, the ion concentration in water increases, so that the liquid vapor pressure of water decreases, while the solid vapor pressure of ice remains unchanged. In order to reach the solid-liquid vapor pressure state of the ice-water mixture, the ice melted. This principle can also explain why salt water is not easy to freeze.

Water is a special substance, that is, the density becomes smaller after freezing (generally, the density is higher in solid state than in liquid state), so the greater the pressure, the lower the melting point of ice. It is often seen that snow melts easily where the wheels run over. After the snow melting agent is sprinkled on the snowy road surface, it is easier to melt the snow after being crushed by vehicles.