Calculating Lattice Enthalpies

Question 1

What is the second step in a Born-Haber cycle?

Answer 1

enthalpy of atomisation of first element

Question 2

What is the third step in a Born-Haber cycle?

Answer 2

Ionisation energy of the first element

Question 3

What is the fourth step in the Born-Haber cycle?

Answer 3

Atomisation of second element

Question 4

What is the final step in a Born-Haber cycle?

Answer 4

Electron affinity of the negative ion

Question 5

What are covalent characteristics?

Answer 5

Positive ions polarise negative ions = distortion of perfect ionic model
More polarisation = more covalent bonding

Question 6

How do you know if an ionic lattice has covalent characteristics?

Answer 6

Experimental lattice enthalpy and Born-Haber enthalpy are very different values

Question 7

What is the first step in drawing a Born-Haber cycle?

Answer 7

Pillars of success
Ionic lattice at the bottom
Latt diss going up to ions
Formation coming down to lattice