1.

Calculate the electronegativity of fluorine from following data : F_(H-H) =104. 2 k cal mol ^(-1) E _(F-F) =36.6 kcal mol ^(-1) E _(H-F) = 134. 6 kcal mol ^(-1) Electronegativity ofH is 2.05

Answer»

Solution :On Paulling SCALE:
`x _(F) -x_(H) =0.182sqrt(Delta _(H)-F)`
(using B.E. in kcal `mol ^(-1))`
`Delta _(H-F) = E_(H-F) - SQRT( E_(H-H) xx E _(F -F))`
`=13.45 - sqrt( 104.2 xx36.6) = 72.84` kcal
From (i)
`x_(F) -x_(H) = 0.182 sqrt(72.84)+ 1.5534`
`x_(F)=x_(H) + 1.4434=2.05+ 1.5534=3.6034`


Discussion

No Comment Found