If water expands as it freezes because of the water molecules difference of charges (hydrogen is positive and oxygen is negative), then does that mean most every other molecule has a neutral charge? Here, the neutral charges would cause any repelling force and you can just squish more molecules together to get a solid that is smaller and more condense than hotter forms.
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Answers (2)
This is a good example of why I have advocated teaching more accurate versions of how things work from the start even if they are a bit more complicated.
First of all, ALL molecules are neutral, pretty much by definition. Molecules may be polar, but the partial positive and negative charges in a molecule balance out to give a neutral molecule.
Water is neutral. Water is polar. Water has a slight negative charge at the oxygen "end" and a slight positive charge at the hydrogen end, but the charges exactly balance to give a neutral water molecule. The molecule is polar because oxygen, being more electronegative than hydrogen, pulls the shared electrons closer to it giving it a slight negative charge, and because the water molecule is bent.
Water expands as it freezes because water it exhibits hydrogen bonding, the strongest of the intermolecular attractions in water. The hexagonal arrangement achieved by water molecules leaves a "hole" in the middle which accounts for the expansion of water (by 1/11th of its volume) as it freezes.
You've got a lot of unlearning to do :)
en.wikipedia.org/wiki/Ice