Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: INeedSerotonin on October 19, 2019, 01:16:54 PM
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Hello
I found this exercise that gave me four explanations to "why is the boiling point of hydrogen so low, i.e., equal to 20 K?", and I had to tell which were true and which were false
Explanations:
I) there are hydrogen bonds;
II) the Van Der Waals forces are weak in intensity;
III) the molecule is non-polar, and there are few electrons;
IV) it is easy to break the covalent bond H-H
Only (II) and (III) are true, but I wonder why (IV) is not. Could you guys please explain it to me? I also am not sure as to why (III) mentions electrons.
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Does boiling have anything to do with breaking covalent bonds?
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Does boiling have anything to do with breaking covalent bonds?
I remember learning that we need to overcome some kind of force in order to boil something,
So I guess that boiling doesn't have anything to do with breaking covalent bonds, but it is all about breaking intermolecular forces? ???
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Yes. A phase change doesn't involve breaking covalent bonds, only intermolecular interactions. If covalent bonds are broken, it's a chemical reaction. If you need to explain something about a boiling point, you have to think about factors that influence the strength of intermolecular forces.
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Yes. A phase change doesn't involve breaking covalent bonds, only intermolecular interactions. If covalent bonds are broken, it's a chemical reaction. If you need to explain something about a boiling point, you have to think about factors that influence the strength of intermolecular forces.
Thank you! ;)
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And H-H bonds are strong. As strong as H-Cl for instance.