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Q.

Why do they use salt to melt ice on the road in the winter?

Tags: food, money, health
Asked by Quest, 09 Apr '13 10:15 pm
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Answers (6)

 
1.

Because salt has a low melting point than the ice
Answered by Annes, 09 Apr '13 11:11 pm

 
  
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2.

Ice forms when the temperature of water reaches 32 degrees Fahrenheit (0 degrees Celsius). When you add salt, that temperature drops A 10-percent salt solution freezes at 20 F and a 20-percent solution freezes at 2 F .On a roadway, this means that if you sprinkle salt on the ice, you can melt it. The salt dissolves into the liquid water in the ice and lowers its freezing point. If you ever watch salt melting ice, you can see the dissolving process happen -- the ice immediately around the grain of salt melts, and the melting spreads out from that point. If the temperature of the roadway is lower than 15 F or so, then the salt really won't have any effect- the solid salt cannot get into the structure of the solid water to start the dissolving process. In that case, spreading sand over the top of the ice to provide traction is a better option.
Answered by aflatoon, 10 Apr '13 09:21 am

 
  
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3.

S a l t
Answered by rajan, 10 Apr '13 07:16 am

 
  
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4.

That way accident wont happen
Answered by malika saran, 10 Apr '13 04:28 am

 
  
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5.

If you live in a place that has lots of snow and ice in the winter, then you have probably seen the highway department spreading salt on the road to melt the ice. You may have also used salt on ice when making home-made ice cream. Salt lowers the freezing/melting point of water, so in both cases the idea is to take advantage of the lower melting point.
Ice forms when the temperature of water reaches 32 degrees Fahrenheit (0 degrees Celsius). When you add salt, that temperature drops: A 10-percent salt solution freezes at 20 F (-6 C), and a 20-percent solution freezes at 2 F (-16 C). On a roadway, this means that if you sprinkle salt on the ice, you can melt it. The salt dissolves into the liquid water in the ice and lowers its freezing point.
If you ever watch salt melting ice, you can see the dissolving process happen -- the ice immediately around the grain of salt melts, and the melting spreads out from that point. If the temperature of the roadway is lower than 15 F or so, then th ...more
Answered by Rocking Raaj, 09 Apr '13 10:20 pm

 
  
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6.

Salt melts faster and ensure the ice is cleared fast
Answered by saranathan Narasimhan, 10 Apr '13 03:53 pm

 
  
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