Born Haber Cycle

What is hess’s law

The enthalpy change for a chemical reaction is independent of the route taken

What is the Born Haber Cycle

A technique for applying Hess’s Law to the standard enthalpy changes that occur during the formation of an ionic compound.

Why is the born haber cycle useful

Lattice enthalpy cannot be measured directly

Born haber cycle order for group one

enthalpy of formation

Atomisation of x

Atomisation of y

First IE of x

First ea of y

Lattice enthalpy of formation

Difference for born haber cycle for group 2

Second ionisation energy is included

Atomisation of chlorine is multiplied by 2

First electron affinity is multiplied by 2

What does a large lattice enthalpy suggest

Stronger ionic bond

What type of ions give stronger ionic bonding

Smaller and higher charge ions