Quote (Thor123422 @ 3 Dec 2018 06:31)
He's not explaining it very well.
For a freezing to happen there's a "bump" of energy that needs to be overcome. After it overcomes that "bump" it ultimately releases energy, but not until it gets over that bump. For freezing that "bump" is really small, so just jostling the container is enough to overcome it. If you add some solid ice then the "bump" becomes so small that it doesn't even matter because the freezing can just happen on the surface of the already existent ice cube instead of having to form a new ice cube from scratch.
Water has "hydrogen bonds" which are only bonds if you take a looser definition than is traditionally applied. The energy of a hydrogen bond is really strong for an intermolecular force, but weak for a covalent bond, so it's kind of in this grey area where it blurs the line between an intermolecular force and a true bond.
That's not really accurate.
No matter how you look at it, all bonds are "water-water" bonds.
Also it's not multiple activation energies to break and reform bonds. It's one activation energy for the intermediate state between the bonds breaking and the new bonds forming.
You forget and don't say anything about the electricity part ?
