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 KBr.

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

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