Lattice Enthalpy and Born-Haber cycles

Na⁺ (g) + Cl^- (g) --> NaCl (s)

• Ionisation

• Combustion

• Lattice enthalpy

• Atomisation

Mg (s) --> Mg (g)

• Ionisation

• Combustion

• Formation

• Atomisation

Cl (g) + e- --> Cl- (g)

• Ionisation

• Electron Affinity

• Combustion

• Formation

Mg (g) --> Mg+ (g) + e-

• Ionisation

• Combustion

• Formation

• Hydration

Na+ (g) + Cl- (g) --> Na+ (aq) + Cl- (aq)

• Formation

• Solution

• Combustion

• Hydration

½ H2 (g) + ½ Cl2 (g) --> HCl (g)

• Formation

• Combustion

• Atomisation

• Ionisation

O^- (g) + e- --> O^2- (g)

• 1st electron affinity

• 2nd electron affinity

• 3rd electron affinity

• 4th electron affinity

C (g)+ O2 (g)--> CO2 (g)

• Ionisation

• Combustion

• hydration

• solution

First electron affinity of an element is usually ________ and second electron affinity is ____________.

• exothermic, endothermic.

• exothermic, exothermic.

• endothermic, endothermic.

• endothermic, exothermic.

What enthalpy change does the number 4 represent?

• Formation

• 1^st ionisation energy of Na

• 1^st electron affinity of Na

• Atomisation of Na