Igcse Model Questions Vol1 2018 Chemistry Question 18
Practice objective / multiple choice question 18 from the 2018 Igcse Model Questions Vol1 Chemistry examination.
The standard enthalpy of formation of solid sodium chloride is \(\Delta_f H^{\circ}(\mathrm{NaCl(s)}) = -411 \text{ kJ mol}^{-1}\). Using a Born-Haber cycle, calculate the lattice energy of NaCl (in kJ mol\(^{-1}\)). The following data are given: sublimation energy of Na(s): \(\Delta H_{\text{sub}} = +108 \text{ kJ mol}^{-1}\); ionisation energy of Na(g): \(IE_1 = +496 \text{ kJ mol}^{-1}\); bond dissociation energy of Cl₂(g): \(D_{\text{Cl-Cl}} = +242 \text{ kJ mol}^{-1}\) (per mole of Cl₂); electron affinity of Cl(g): \(EA = -349 \text{ kJ mol}^{-1}\). Assume that one mole of NaCl is formed from one mole of Na atoms and one mole of Cl atoms.
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This is Igcse Model Questions Vol1 2018 Chemistry Question 18. It is one of the objective questions from the 2018 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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