Worksheet: Born–Haber Cycle Calculations

In this worksheet, we will practice using Born–Haber cycles to calculate enthalpy changes for the formation and dissociation of ionic lattices.

Q1:

Using the table below, determine the crystal lattice energy of K B r .

Δ 𝐻 s u b ( k J / m o l ) IE (kJ/mol) EA (kJ/mol) Δ 𝐻 d i s ( k J / m o l ) Δ 𝐻 f ( k J / m o l )
L i 162 L i 520 F 3 2 8 F 2 79 L i F 6 1 2 L i C l 6 1 2 L i B r 6 1 2
N a 108 N a 496 C l 3 4 9 C l 2 122 N a F 5 6 9 N a C l 4 1 1 N a B r 3 6 0
K 90 K 419 B r 3 2 5 B r 2 112 K F 5 6 2 K C l 4 3 6 K B r 3 9 2

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