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(1)/(2)A(2)(g)+(1)/(2)B(2)(g)toAB(g),Del...

`(1)/(2)A_(2)(g)+(1)/(2)B_(2)(g)toAB(g),DeltaH=-50kcal`. If the bond energies of `A_(2)(g),B_(2)(g) and AB(g)` are x `kcal*mol^(-1)` `(x)/(2)kcal*mol^(-1)` and x kcal`*mol^(-1)` respectively then what will be the value of x?

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x=200 kcal.
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