Question

Salt is spread on pavement snow during winter in cold countries. Give reason.

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Answer 1

Answer:

Salt comes in grain sizes of 6mm or 10mm and is spread at rates between 10 and 40 grams per square metre depending upon the forecast road surface temperatures and if snow is forecast or is falling. When spread on top of ice or snow, each grain will begin to melt the surrounding ice working its way outwards.

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.

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