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Quick enthalpy question - HSN forum

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Quick enthalpy question

Started by celticfcz, May 27 2007 03:22 PM

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#1 celticfcz

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Posted 27 May 2007 - 03:22 PM

Just a wee question which Im sure i should know but dont so any help would be great thanks.

It gives a table :

Compound Enthalpy of combustion/kj mol^-1

methanol -715
ethanol -1371
propan-1-ol -2010

Why is there a regular increase in enthalpies of combustion from methanol to ethanol to propan-1-ol?

Thanks

#2 BuckminsterFullerene

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Posted 27 May 2007 - 03:28 PM

Because there is a regular increase in CH2 homologous units in each successive step
Chemical Engineering - Edinburgh

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#3 celticfcz

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Posted 27 May 2007 - 03:29 PM

thank you!! - had to be something like that!! rolleyes.gif
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