Answer: Lattice enthalpy of ionic compounds indirectly.
- A Lattice enthalpy of ionic compounds indirectly
- B The direct bond dissociation energy of purely covalent bonds
- C Gibbs free energy measured directly through calorimetry
- D The activation energy barrier of a given reaction
Correct answer: A. Lattice enthalpy of ionic compounds indirectly
Explanation: The Born-Haber cycle applies Hess's law to ionic formation, combining measurable enthalpies to calculate the lattice energy.
VSEPR theory predicts molecular shape from the number of bonding and lone electron pairs around the central atom.
Concept context
Understand how atoms join to form molecules. Covers ionic and covalent bonding, VSEPR theory, hybridization (sp, sp², sp³), molecular orbital theory, bond polarity, and intermolecular forces like hydrogen bonding.
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