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Calculate DeltaH^(@) ("in" kJmol^(-1)) ...

Calculate `DeltaH^(@)` `("in" kJmol^(-1))` for the reaction
`CH_(2)Cl_(2)(g)rarrC(g)+2H(g)+2Cl(g).`
The average bond enthalpie of `C-H` and `C-C1` bonds are `414 kJ mol^(-1)`.

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The correct Answer is:
`1488 kJ mol^(-1)`
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