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Topic: Question about the boiling/melting point of alkanes and alkenes  (Read 5744 times)

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Offline goo

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Question about the boiling/melting point of alkanes and alkenes
« on: January 07, 2007, 10:13:12 AM »
I want to know if alkanes generally have higher melting/boiling point than alkenes
and what's the reason for this phenomenon
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Offline AhmedEzatAlzawalaty

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Re: Question about the boiling/melting point of alkanes and alkenes
« Reply #1 on: January 12, 2007, 01:48:49 PM »
you know that the mp depends on molecular wt and other factors so as molwt decreases as in alkene due to unsaturated nature the mp and bp decreases and so on
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Offline jooann

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Re: Question about the boiling/melting point of alkanes and alkenes
« Reply #2 on: January 14, 2007, 03:59:19 AM »
bcos alkenes contain double bond and this make it unstable and easier to reach its bp & mp
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Offline thegame11

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Re: Question about the boiling/melting point of alkanes and alkenes
« Reply #3 on: January 15, 2007, 06:58:39 PM »
Quote from: ahmedezat on January 12, 2007, 01:48:49 PM
you know that the mp depends on molecular wt and other factors so as molwt decreases as in alkene due to unsaturated nature the mp and bp decreases and so on

To further add to this, higher molecular weight means that there are stronger London Dispersion forces holding the atoms together.
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