Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: neobenzene on August 12, 2012, 12:00:12 AM
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Hi! I have this major, basic doubt. Is intermolecular hydrogen bonding strong or weak? I have always been taught in school that they are "strong" bonds, but I came across this video on YouTube recently which states that they are "weak" bonds.
Which one is right?
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Hi! I have this major, basic doubt. Is intermolecular hydrogen bonding strong or weak? I have always been taught in school that they are "strong" bonds, but I came across this video on YouTube recently which states that they are "weak" bonds.
Which one is right?
A quote from a Wiki page:
"The hydrogen bond (5 to 30 kJ/mole) is stronger than a van der Waals interaction, but weaker than covalent or ionic bonds. This type of bond occurs in both inorganic molecules such as water and organic molecules like DNA."
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But are hydrogen bonds strong enough to raise the melting/boiling points of a molecule?
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Yes and water is the classic example.
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So does that mean, NaI, which is very covalent according to Fajan's rule, has very high melting/boiling points? And by this, theoretically it should be more than that of water. Is that right?
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So does that mean, NaI, which is very covalent according to Fajan's rule, has very high melting/boiling points? And by this, theoretically it should be more than that of water. Is that right?
Yes it has a much much higher MPt. and BPt. than water, and not just theoretically.
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Thank you very much, discodermolide and DrCMS!