Cooling ice With Salt
Most recent answer: 10/22/2007
Q:
Why does salt lower the temperature of ice?
- Anonymous
- Anonymous
A:
Thats a nice question. If the ice starts out very cold (colder than -21°C), then sprinkling some salt on it wont melt any of the ice and, unless the salt is even colder, wont cool the ice. If the ice is warmer than -21°C and, of course, colder than 0°C, then the salt will melt some of the ice. Melting ice draws energy from somewhere, because the molecules in the liquid water dont have as low-energy contacts with each other as in the solid. The energy will mostly come from the ice, cooling it down.
Mike W.
Lee H
Mike W.
Lee H
(published on 10/22/2007)