Born Haber's cycle enables us to calculate:
Correct answer: C. Lattice energy
- A. Heat energy
- B. Heat of hydration
- C. Lattice energy
- D. Heat of solution
Explanation
The Born-Haber cycle is a theoretical model that allows us to calculate the lattice energy of ionic compounds. It uses Hess's Law of Constant Heat Summation to relate the formation of an ionic compound from its constituent elements to the lattice energy. This cycle involves several steps, including ionization energy, electron affinity, and enthalpy of formation, among others. Option A, 'Heat energy,' is incorrect as it is a broad term not specific to the Born-Haber cycle. Option B, 'Heat of hydration,' and Option D, 'Heat of solution,' both involve the dissolution of ions in water or other solvents, which are not the focus of the Born-Haber cycle. Option C, 'Lattice energy,' is correct because the Born-Haber cycle is specifically designed to determine this energy, which is a measure of the strength of the forces between the ions in an ionic solid.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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