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Learning objective

Calculate lattice enthalpy from Born-Haber data.

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)

Aqa A Level ChemistryPhysical chemistry

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Understand this objective

Quick explanation

Calculate lattice enthalpy from Born-Haber data

  • This point belongs to Thermodynamics (A-level only), especially Born-Haber cycles (A-level only).
  • You need to be able to calculate lattice enthalpy from Born-Haber data.
  • The key ideas to know are lattice enthalpy.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

lattice enthalpy

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 statements about lattice enthalpy is correct?

Direct answer

B. Lattice enthalpy is the energy required to separate one mole of a solid ionic compound into its gaseous ions.

Key terms

  • Lattice Enthalpy: The enthalpy change associated with the formation of one mole of an ionic solid from its gaseous ions.
  • Born-Haber Cycle: A thermodynamic cycle that relates the lattice enthalpy of an ionic compound to other enthalpy changes.

Common trap

Incorrect sign for lattice enthalpy: Remember that lattice enthalpy is typically negative for the formation of ionic solids, as energy is released.

Related questions

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Question 1

Which of the following statements about lattice enthalpy is correct?

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