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2001 - Written Paper - Q5

jamiep

Posted 30 May 2005 - 07:51 PM

Vinyl acetate and hexane have the same relative formula mass. Explain why you would expect vinyl acetate to have higher boiling point than hexan.

This is worth 2 marks. My answer was as follows:

-Vinyl Acetate will have hydrogen bonding which means more energy will be needed to break the bonds

-Vinyl Acetate has 2 double band which are more difficult to break (thus needing more energy) where as hexane is fully saturated.

Do you think this is two marks worth?

dondon

Posted 30 May 2005 - 07:54 PM

I think so because it wouldn't expect you to write four points for a half mark each coz its a slightly more complicated question

dfx

Posted 30 May 2005 - 07:55 PM

The marking guide says:

Stronger intermolecular bonds in vinyl acetate due to hexane having can der waal's forces only

OR

vinyl acetate having permanenet dipole interactions.

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