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Reactions of Alkyl Halides

Heat of forma...

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Heat of formation of benzene; assuming noresonance. Given thatBE (C-C)83 kcalBE (C=C)140 kcalBE (C-H) 99 kcalHeat of atomisation of C = 170.9 kcalHeat of atomisation of H104.2 kcalwill be(1) 39 kcal(2) 75 kcal(3) 1263 kcal(4) 421 kcal

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