Alpha commodities: melting ice by making it colder

Many people believe that putting salt on ice somehow heats the ice up and makes it melt, leaving wet, glistening road where that patch of black ice or white snow once was.

Many people believe that putting salt on ice somehow heats the ice up and makes it melt, leaving wet, glistening road where that patch of black ice or white snow once was. Nothing could be further from the truth. Putting salt on ice and snow makes temperatures plummet like a stone. And yet still the ice melts. So what on earth is going on?

First of all let us consider a simple experiment and what it means. Fill a bucket with ice, and then top it up with cold water. Give it a bit of a stir and then leave it for about five minutes. …Read More

 

 

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