Asked in Acids and Bases
Acids and Bases

Why is the boiling point of methane much lower than the boiling point of hydrochloric acid?



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Because of the hydrogen bonds in HCl and it's polarity. High polarity = high boiling point. All alkanes (methane) are nonpolar and have low boiling points. Alcohols and compounds with hydrogen bonding have higher boiling points because hydrogen bonds are very strong.

Ask a chemistry teacher if you need a better explanation.