The heat of sublimation of potassium is 98kJ/mol, the heat of dissociation of bromine gas is 192.5 kJ/mol. The ionization energy of K is 414 kJ/mol. The electron affinity of Br is -334.7 kJ/mol and the heat of formation of KBr is -405.8 kJ/mol. Calculate the lattice energy of KBr
Answer: 679.3
Explanation
Lattice energy is calculated using the Born-Haber cycle, considering the heat of sublimation, dissociation, ionization, electron affinity, and heat of formation.
After applying the Born-Haber cycle, the lattice energy of KBr is -679.3 kJ/mol.
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