[问答题]
Properties and behaviors of organic molecules can be i elvzf y7ee1:,nferre(1m v75hiir*i6zp h pizdl,57j w:glld using intermolecular force5zi6 pl(h5jigh 7drl:mpzv7i ,1iwl *s.
Explain, giving a reason, which of the following pairs will have a higher boiling point:
1.Propane, butane.
2.Ethanol, ethanoic acid.
3.Propanol, propanone.