Doug Miller wrote:

... another effect of the salt is that lowering the melting point causes
the phase transition -- which as RJK correctly pointed out is the step
that "eats" the most heat -- to occur much sooner.

I wonder what that means...

Simply that much more energy is absorbed in melting the ice (the phase
transition from solid to liquid) than in raising the temperature of the
mixture.

Still makes no sense to me.

Nick