Calculate the Lattice Enthalpy of Potassium Fluoride from the Following $\Delta$

question 172

Multiple Choice

Calculate the lattice enthalpy of potassium fluoride from the following data.
Enthalpy of formation of K(g) : +89 kJ.mol^-1
First ionization energy of K(g) : +418 kJ.mol^-1
Enthalpy of formation of F(g) : +79 kJ.mol^-1
Electron affinity of F(g) : +328 ( $\Delta$ H = kJ.mol^-1
Enthalpy of formation of KF(s) : -567 kJ.mol^-1

• A) 1481 kJ.mol^-1
• B) 825 kJ.mol^-1
• C) 904 kJ.mol^-1
• D) 497 kJ.mol^-1
• E) 347 kJ.mol^-1