Member Since Jul 31st, 2007
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Jul 31st 2007 2:43AM Your description of why this works is wrong. It actually causes the the water to freeze at a lower temperature, not the ice to melt at a lower temperature.
With regular ice water ice is forming and melting at about the same rate. When the ice melts it requires energy to break those bond which it draws from the water. without salt this cases that water to freeze which releases some energy and keeps the temperature constant at 0 F. When salt is added ice ceases to form so energy more energy is drawn out of the water than is added to it.
the ice doesn't change, the water does.