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Question on the reason salt melts the ice: One teacher said that salt will lower the temperature of ice, but if it lowers the temp of ice at 32 degrees wouldn't that make the ice colder instead of melting it? I am trying to find a simple way to explain to the kids why the salt(added to ice) helps the milk turn to ice cream...Using this in my Matter unit: liquids to solids Thanks!
Lynne in TN The salt/ice mixture has a lower freezing/melting point than ice alone (colligative properties).

The ice/salt/water mixture will cool to the new melting point and stay there until all the ice has melted. Temperature does not change during changes of phase.

The ice melts because it is absorbing energy from the room.

On ...See More
Mar 30, 2012
retired The ice also absorbs heat energy from the ice cream mix, freezing it.

On 3/30/12, Lynne in TN wrote: > The salt/ice mixture has a lower freezing/melting point than > ice alone (colligative properties). > > The ice/salt/water mixture will cool to the new melting point > and stay there until all the ice has melted. Temperature...See More
Mar 30, 2012


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