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What is the bond enthalpy of Xe-F bond ?...

What is the bond enthalpy of `Xe-F` bond ?
`XeF_(4)(g)rarrXe^(+)(g)+F^(-)(g)+F_(2)(g)+F(g)," "Delta_(r)H=292"kcal/mol"`
Given : Ionization energy of `Xe=279"kcal/mol"`
`B.E.(F-F) = 30"kcal/mol"`, Electron affinity of F = 85 kcal/mol

A

24 kcal/mol

B

34 kcal/mol

C

`8.5` kcal/mol

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`Delta_(r)H` = [Heat supplied] - [Heat evolved]
`292=[4x + 279] - [38 + 85]`
implies x = 34 kcal/mol
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