Can anybody please explain to me? So salt lowers the freezing point of ice right? When you put salt on your ice to make it colder, is there any heat transfer between the two?
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No, there is not. If you add salt to ice there is no temperature change. If the ice is 0C pre-salt, it remains 0C post-salt.
What happens is that salty water doesn’t freeze until, say, -10C. So your now 0C salt+ice mixture, being greater than -10C will melt to liquid water. If it’s exactly 0C outside, that’s it, you have 0C salty water.
If the temperature continues to drop to -2C, -4C, -8C the salty water just gets colder. Once the temperature reaches -10C the water will freeze once again and turn to ice.
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