Boiling point
With reasonable illustrations, compare the boiling points of the following compounds. Propanone, propane, propanol, Propene, propanal and propanoic acid
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(edited 3 years ago)
If the compound contains O, N, or F bonded to H, it will have hydrogen bonding, which is the strongest inter molecular force and hence the highest boiling point.
Compounds containing O, N, and F without bonds to hydrogen may still have permanent dipole interactions, slightly weaker than hydrogen bonding.
Other molecules will have Van der Waals forces, the weakest force. Molecules with a C=C bond cannot fit together as closely, so are easier to break apart. Molecules without C=C bonds fit together more closely and have higher boiling points in comparison.
I'm sorry if this is vague or confusing, but as per the instructions above I'm trying not to give you the answer. If you can categorise the compounds according to what I've said, you can begin to form an order of boiling point.
Compounds containing O, N, and F without bonds to hydrogen may still have permanent dipole interactions, slightly weaker than hydrogen bonding.
Other molecules will have Van der Waals forces, the weakest force. Molecules with a C=C bond cannot fit together as closely, so are easier to break apart. Molecules without C=C bonds fit together more closely and have higher boiling points in comparison.
I'm sorry if this is vague or confusing, but as per the instructions above I'm trying not to give you the answer. If you can categorise the compounds according to what I've said, you can begin to form an order of boiling point.
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