Doubt from thermochemistry

plz solve 69 and 70.

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Isn't it B for 69?

And for 70 B

Yes plz tell how u did...

First we should give energy to break the resonance stabilisation of benzene and then hydrogenation rxn gives out some energy.

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In 70 find the energy realesed by breaking three double bonds .

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I did this

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I think Both are same :slightly_smiling_face: common bonds energy cancel out

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