Ethanol (C₂H₅OH) boils at 78 °C while dimethyl ether (CH₃OCH₃), with the same molecular formula, boils at about −24 °C. Why?
Correct answer B. Ethanol molecules form hydrogen bonds with each other
Explanation
Ethanol has an O–H group, so its molecules are linked by hydrogen bonds. Dimethyl ether has no O–H bond, so only weaker forces act between its molecules.
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