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Alcohols, Phenols, and Ethers — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryAlcohols, Phenols, and Ethers2 Marks
Question
Explain why alcohols and ethers of comparable molecular mass have different boiling points?
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Answer

Ethers have low polarity and as a result do not show any association by intermolecular hydrogen bonding. Therefore, ethers have low boiling points and lower than that of isomeric alcohols and almost same as those of alkanes of comparable molecular masses.
CH3CH2OCH2CH3 CH3CH2CH2CH2OH CH3CH2CH2CH2CH3
Diethyl ether n-Butyl alcohol n-Pentane
307.6 K 390 K 309.1 K
The large difference in boiling points of alcohols and ethers is due to the presence of hydrogen bonding in alcohols.

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