Learning objective
Construct Born-Haber cycles for ionic compounds.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Thermodynamics (A-level only)
Subtopic
Born-Haber cycles (A-level only)
Study support
Understand this objective
Quick explanation
Construct Born-Haber cycles for ionic compounds
- This point belongs to Thermodynamics (A-level only), especially Born-Haber cycles (A-level only).
- You need to be able to construct Born-Haber cycles for ionic compounds.
- The key ideas to know are Born-Haber cycle.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Born-Haber cycles (A-level only) to exam-style questions, flashcards, and revision notes for Thermodynamics (A-level only).
Quick student answer
Which of the following steps is NOT included in the Born-Haber cycle for the formation of sodium chloride (NaCl)?
Direct answer
The correct answer is 'Formation of solid NaCl'. This step occurs after the Born-Haber cycle is completed, as it represents the final product formation.
Key terms
- Lattice Enthalpy: The energy released when one mole of an ionic solid is formed from its gaseous ions.
- Born-Haber Cycle: A thermodynamic cycle that relates the lattice enthalpy of an ionic compound to its formation enthalpy.
Common trap
Confusing lattice enthalpy with enthalpy of formation: Lattice enthalpy specifically refers to the energy associated with the formation of the ionic solid from gaseous ions, while enthalpy of formation refers to the overall energy change when forming the compound from its elements.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Calculate lattice enthalpy from Born-Haber data.
Born-Haber cycles (A-level only)
- Compare experimental and theoretical lattice enthalpies.
Born-Haber cycles (A-level only)
- Use lattice enthalpy comparisons to infer covalent character.
Born-Haber cycles (A-level only)
- Explain entropy as a measure of dispersal of energy or disorder.
Entropy and Gibbs free energy (A-level only)
- Calculate entropy changes from standard entropy data.
Entropy and Gibbs free energy (A-level only)