Max Born and Fritz Haber developed the Born-Haber cycle in 1916, which is used for measuring enthalpy that otherwise couldn't be measured. Young scientists solve four matching puzzles using their knowledge of the stages, standard enthalpy changes, and equations involved in NaCl reactions. Ions, elements, atoms, and compounds all play a role in this complex system.

Concepts

enthalpy change, enthalpy, chemical equations

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Additional Tags

science

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Instructional Ideas

• Review lattice energy and enthalpy before assigning the puzzles

Classroom Considerations

• Assumes advanced knowledge of the Born-Haber cycle
• Relies on prior knowledge of how to solve Sudoku-style puzzles

Pros

• Works well in traditional or flipped classrooms
• Offers both online and worksheet versions of the puzzles

Cons

• None

Common Core

RST.9-10.4 RST.11-12.4