The enthalpy of formation of xef2(g) is –108 kj mol–1 and the bond dissociation enthalpy of the f–f bond is 155 kj mol–1 . what is the average bond dissociation enthalpy of a xe–f bond

Average bond dissociation enthalpy of a (Xe–F) bond is 131.5kJ/mol.

Expatiation:

..(1)

..(2)

Subtracting (1) from (2)

Average bond dissociation enthalpy of a (Xe–F) bond :

Since there are two (Xe-F) bonds in molecule the average the bond energy of Xe-f bond will be =

Hence, Average bond dissociation enthalpy of a (Xe–F) bond is 131.5kJ/mol

the formula would be mgso4

mgso[subscript]4