WATER SHOULD FREEZE AT -100C AND BOIL AT -90C ....TRUE OR FALSE?

Can someone who understands molecular weights confirm and explain this please? I read in a book, " Most substances boil and freeze at predictable temperatures. They follow an orderly progression which grows in proportion to their molecular weights. The lower the weight, the narrower the temperature range at... show more Can someone who understands molecular weights confirm and explain this please?

I read in a book, " Most substances boil and freeze at predictable temperatures. They follow an orderly progression which grows in proportion to their molecular weights. The lower the weight, the narrower the temperature range at which they normally exist. Not water. In theory, it ought to freeze at -100C and boil just ten degrees higher at -90C."
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