Question

Why is the melting and boiling points of \[\ce{C4H8}\] higher than that of \[\ce{C3H6}\] or \[\ce{C2H4}\]?

Answer 1

Butene \[\ce{C4H8}\] has greater melting and boiling temperatures than propene \[\ce{C3H6}\] or ethene \[\ce{C2H4}\] due to its stronger intermolecular interactions. These forces arise from a double bond, higher dipole-dipole interactions, and a longer chain length than propene and ethene.