Elements and Compounds

Do alkene or alkane has higher melting point?


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alkanes have higher melting points than alkenes. Van der Waals forces are present between molecules of alkanes and alkenes, and the strength of the can der Waals forces is porportional to the melting/boiling point of the alkanes/alkenes

Since the strength of the van der Waals forces is dependent on the number of electrons, and alkanes have more electrons (with additional 2 hydrogen atoms) compared to an alkene with same number of carbon atoms, thus alkanes generally have higher melting points