system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how does salt melt ice?
gpt
Salt will be absorbed by the surface of the ice causing it to become salt water. Salt water have a lower freezing point then fresh water. So the ice will melt even if it does not heat up. In fact it will cool down by this but because of the lower freezing point it will still be liquid. The salt in the water will then be absorbed by the new ice surface and the process continues until all the ice have become salt water or until the salt concentration becomes so low that it will not melt the ice any longer.