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Use the bond energies in the table to es...

Use the bond energies in the table to estimate `DeltaH` for this reaction:
`CH_(2) = CH_(2) + CO_(2) rarr CICH_(2) -CH_(2)CI`

A

`DeltaH = 684 kJ`

B

`Deltah =- 154 kJ`

C

`DeltaH = 189 kJ`

D

`DeltaH = 177 kJ`

Text Solution

Verified by Experts

`DeltaH("reaction") sum (BE) ("reactants") - sum (BE) ("products")`
`[(BE)_(C=C) +4(BE)_(C-H) +(BE)_(CI-CI)]`
`-[4(BE)_(C-H)+2(BE)_(C-CI) +(BE)_(C-C)]`
`= [(BE)_(C=C) +(BE)_(CI-CI)] - [2(BE)_(C-CI) +(BE)_(C-C)]`
`=[612 +243] -[2 xx 331 +347] =- 154 kJ`
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