Lattice enthalpy of MF2=bond enthalpy of F2 + electron affinity of F +enthalpy of sublimation of M +first ionization energy of M + second ionization energy of M + enthalpy of formation of MF2.
"Lattice enthalpy= (159-328+112+395+587-377) kJ\/mol"
Lattice enthalpy= 548 kJ/mol
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