8.77  [ENDORSED]

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Michelle Dong 1F
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Joined: Fri Sep 29, 2017 7:04 am

8.77

Postby Michelle Dong 1F » Mon Jan 22, 2018 10:16 am

Benzene is more stable and less reactive than would be predicted from its Kekule structures. Use the mean bond enthalpies in Table 8.7 to calculate the lowering in molar energy when resonance is allowed between the Kekule structures of benzene.

What does it mean in terms of enthalpy when it says benzene is more stable with resonance?

Sohini Halder 1G
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Re: 8.77

Postby Sohini Halder 1G » Mon Jan 22, 2018 11:31 am

I think that the lower DeltaH given when finding benzene with resonance shows a lowering of energy, so formation of benzene with resonance is more stable. 228kj/mol vs -1kj/mol

Lauren Seidl 1D
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Joined: Fri Sep 29, 2017 7:06 am

Re: 8.77  [ENDORSED]

Postby Lauren Seidl 1D » Mon Jan 22, 2018 12:17 pm

The kekule structure of benzene suggests alternating single and double bonds, whereas the resonance structure contains six bonds that are between a single and double bond. The resonance structure is more stable, as all six bonds between the carbon molecules are the same.


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