# Part I. Use a Born-Haber cycle to calculate the lattice energy of KCl from the following...

###### Question:

Part I. Use a Born-Haber cycle to calculate the lattice energy of KCl from the following data. (5 marks) Ionization energy of K(g) = 444.0 kJ mol-1 Electron Affinity of Cl(g) = -381.0 kJ mol-1 Energy to Sublime K(s) = 152.0 kJ mol-1 Bond energy of Cl2 = 201.0 kJ mol-1 ∆rH for K(s) + 1/2 Cl2(g) ↔ KCl(s) = -480.0 kJ mol-1 art

II. Using the lattice energy calculated in part I determine the enthalpy of solution potassium chloride is added to water. To solve this problem use ΔhydH(K+) = -326.00 kJ mol-1 and ΔhydH(Cl-) = -348.00 kJ mol-1.

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