The bond dissociation energy depends upo...

The bond dissociation energy depends upon the nature of the bond and nature of the molecule. If any molecule more than 1 bonds of similar nature are present then the bond energy reported is the average bond energy.
Heat evolved when 0.75 mol of molten aluminium at its melting point of `658^(@)C` is solidified and cooled to `25^(@)C`. The enthalpy of fusion of aluminium is `76.8 "cal" g^(-1) and C_(P)= 5.8 "cal" mol^(-1) ""^(0)C`

`-4.3` kcal

4.3 kcal

`-1.199k` cal

1.199kcal

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