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    Why does propanoic acid have a relatively high boiling point? (141 degees C)

    I know it exhibits hydrogen bonding due to the OH bond in the functional group but there must be another reason as its boiling point is still 41 degrees above the boiling point of water which also has hydrogen bonding.

    I'm thinking that maybe its something to do with the carbonyl bond in the functional group but I don't know, help would be appreciated!

    Cheers.
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    The hydrogen bonding is the main cause, carboxylic acids form dimers through two hydrogen bonds. You should also take into account that propanoic acid is more than 4 times the mass of water :p:
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    (Original post by EierVonSatan)
    The hydrogen bonding is the main cause, carboxylic acids form dimers through two hydrogen bonds. You should also take into account that propanoic acid is more than 4 times the mass of water :p:
    Oh yeah I guess the van der waal's forces will be 4 times stronger then. I just thought it was a little strange.....

    Thanks.
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    Both water and propanoic acid can form two hydrogen bonds.

    So the only thing that differs is the molecular mass, hence propanoic acid has a higher boiling point due to more Van der Waal's forces.
 
 
 
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