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Calculate the enthalpy change during the...

Calculate the enthalpy change during the reaction `:`
`H_(2(g))+Br_(2(g))rarr 2HBr_((g))`
Given, `e_(H-H)=435kJ mol^(-1),e_(Br-Br)=192kJ mol^(-1)` and `e_(H-Br)=368kJ mol^(-1).`

Text Solution

Verified by Experts

`H_(2) +Br_(2) rarr 2HBr`
`DeltaH=` Bond energy data for formaation of bond `+` bond energy data for dissociation of bond.
`=-[2xxe_(H-HBr)]+e_(H-H)+e_(Br-Br)]`
`=-2xx368+435+192=-109kJ`
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