How does salt grit dissolve snow?

bobblicious | 10:12 Wed 02nd Aug 2006 | How it Works

6 Answers

How does salt grit dissolve snow and if there is salt in the sea then why dont all the ice bergs melt?

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ugly_bob

the salt dissolves in the water. Salty water has a lower freezing point than fresh. The grit on the roadds is rated to around -30 I think, so any colder it wont work.

As for the icebergs, the sea isn't as salty would be my guess.

dzug

The icebergs do melt - it just takes time.

violetblue

Er, the icebergs are melting, according to global warning experts.

bobblicious

Question Author

violetblue: i thought it was because of the heat from the sun not salt!!??

RATTER14

I think I am right in saying that the grit we see on the roads and being dicharged from gritting lorries is in fact rock salt although it looks like grit it is in fact just salt.

Ralph

Salty water has a freezing point of roughly -30�C while as you know, fresh water has a freezing point of 0�C.
Icebergs are made of fresh water which is why they are frozen even though they are floating in the salty sea.

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