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Calculate the electron affinity of Br fr...

Calculate the electron affinity of Br from following data :
Lattice energy of NaBr =-`736 "kJ mole" ^(-1)`
`B.E._((Br.Br))=192 "kJ mole"^(_1)`
`DeltaH_(f(NaBr))=-376"kJmole"^(-1)`
`(I.E.)_(Na)=490"kJ mole"^(-1)`
`DeltaH_(298K)` of sublemation of `Na=109 "kJ mole"^(-1)`

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