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Estimate the average S-F bond enthalpy i...

Estimate the average `S-F` bond enthalpy in `SF_(6)`. The values of standard enthalpy of formation of `SF_(6)(g),S(g)` and `F(g)` are :-`1100, 274` and `80 kJ mol^(-1)` respectively.

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(i) `309.17`
(ii) `-3273.735` kJ
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