re: Hot water from the tap, do you use it to cook?

quote:

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cold water would boil faster

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Physics tells us this is wrong, but many people persist in believing "alternate facts". Another is that previously-boiled water freezes faster. A popular belief is that water in altered physical states can have special health benefits. You can buy devices with the promise of generating such special water...save your money.

Ironically, physics or confusion about physics is behind some of these beliefs. Liquid water is a mix of molecular chains shifting among configurations in a small fraction of a second. Different mixtures can have slightly different properties. For unusual mixtures to persist requires highly modified experimental environments.