Asked by: Isora Molenaarscience chemistry
Why does propene have a higher boiling point than ethene?
Last Updated: 19th June, 2021
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Correspondingly, why does ethene have a higher boiling point than ethane?
Ethane has stronger intermolecular attractions (van der Waal's forces) than ethene and so has the higher boiling point.
Similarly, do double bonds have higher boiling points? I thought they were more stable so they would have a higher boiling point. Cis double bonds prevent the tight packing between the hydrocarbon chain, thus lowering intermolecular attractions. This decreases boiling point.
Moreover, why do alkanes have higher boiling points?
As the chain length (numbers of carbons) increases the melting and boiling points of the alkanes gradually increase for these compounds. The reason that longer chain molecules have higher boiling points is that longer chain molecules become wrapped around and enmeshed in each other much like the strands of spaghetti.
What has the highest boiling point?
Carbon has the highest melting point at 3823 K (3550 C) and Rhenium has the highest boiling point at 5870 K (5594 C). According to google, Tungsten boils at 5555 C, but rhenium is 39 C higher at 5594 C. Also according to google, Tungsten melts at 3422 C, but Carbon's melting point is 128 C hotter, at 3550 C.