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April 25, 2015

Homework Help: science

Posted by kayci on Wednesday, May 12, 2010 at 7:55pm.

which of the following is the best reason salt is sometimes spread on icy highways?

1) when a car drives on the ice, the firstion created between the salt and the ice produces heat that melts the ice.
2)when salt chemically reacts with the water, the heat produced melts the ice.
3)the salt obsorbs more sunlight than ice, warming the ice and causing it to melt.
4)the mixture of ice and salt has a lower freezing tempature than water, so the ice melts.
5)the salt contains heat that melts the ice

i picked 2 but not sure!

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