Arrange the following alkenes in increasing order of their boiling poi

Arrange the following alkenes in increasing order of their boiling points. But-1-ene, 2,3-dimethylbut-2-ene, 2- methylpropene, propene, 2-methylbut-2-ene.

Answer»

Propene < 2-methylpropene < but-1-ene < 2- methylbut-2-ene < 2,3-dimethylbut-2-ene.

Note: Melting points and boiling points of alkenes.

Formula	Name	Molecular mass(u).	b.p.(K)	m.p.(K)
CH₂= CH₂	Ethane	28	171	104
CH₂ = CHCH₃	propane	42	225	88
CH₂ = CHCH₂CH₃	But- I-ene	56	267	-
CH₂ = CH(CH₂)₂CH₃	Pent-I-ene	70	303	-
CH₂ = CH(CH₂)₃CH₃	Hex-I-ene	84	337	135
cis-CH₃CH = CHCH₃	cis-But-2-ene	56	277	134
trans-CH₃CH = CHCH₃	trans-But-2-ene	56	274	167
CH₂ = C(CH₃)₂	Isobutylene	56	266	132

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Arrange the following alkenes in increasing order of their boiling points. But-1-ene, 2,3-dimethylbut-2-ene, 2- methylpropene, propene, 2-methylbut-2-ene.

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