H bond

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Tatiana 4B
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Joined: Fri Sep 28, 2018 12:28 am

H bond

Postby Tatiana 4B » Fri Nov 09, 2018 2:30 pm

Why is the bond between an O and H atom in H2O shorter than the Hydrogen bond between an O and H between two water molecules?

Posts: 65
Joined: Fri Sep 28, 2018 12:16 am

Re: H bond

Postby deepto_mizan1H » Fri Nov 09, 2018 2:40 pm

Since the bond in the H2O atom is a single covalent bond between Oxygen and Hydrogen and the Hydrogen bond between two water molecules is due to lone pair pull, they exhibit different levels of attraction. A covalent bond is a true physical sharing and distortion of the electron cloud between the molecules to be able to share them, while the Hydrogen bond we see between the molecules is not a true physical sharing. The bond can be conceptualized as the interaction between polarities of the molecules, therefore at a larger distance and can be broken easier than lysing a water molecule itself.

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