(l), (g) and the symbol for an electron, e-, write an equation in each case to define the following terms: (i) The first ionization energy of lithium: Li(g) → Li+ + 1eDH = +520 kJ mol (ii) The heat of formation of lithium chloride: Li(s) + ❜l2(g) → LiCl(s) DHf = -409 kJ/mol (iii) The electron affinity of chlorine: Cl(g) + 1e- → Cl-(g) DH = -349 kJ/mol (iv) The lattice energy of lithium chloride: LiCl(s) → Li+(g) + Cl-(g) DH = ?
Its lattice energy may be calculated from a Born-Haber cycle using the following experimental data: Ionization energy of Li = +520 kJ mol Heat to convert Li(s) to Li(g) = +159 kJ mol Heat of formation of LiCl = -409 kJ mol Heat to convert Cl2(g) to Cl(g) = +122 kJ mol Electron affinity of chlorine atoms = -349 kJ molĪ) Using the usual chemical symbols, the state symbols (s), b) Construct a labeled Born-Haber cycle for the formation of LiCl. (iv) The lattice energy of lithium chloride. (ii) The heat of formation of lithium chloride. Its lattice energy may be calculated from a Born-Haber cycle using the following experimental data: Ionization energy of Li = +520 kJ mol Heat to convert Li(s) to Li(g) = +159 kJ mol Heat of formation of LiCl = -409 kJ mol Heat to convert Cl2(g) to Cl(g) = +122 kJ mol Electron affinity of chlorine atoms = -349 kJ mol a) Using the usual chemical symbols, the state symbols (s), (l), (g) and the symbol for an electron, e-, write an equation in each case to define the following terms: (i) The first ionization energy of lithium. A The electron affinity of chlorine is z. C The lattice energy of sodium chloride is v. B The first ionization energy of sodium is w. Which one of the following statements is correct? A The electron affinity of chlorine is z. QUESTION 2: The Born-Haber cycle for sodium chloride is represented below: from which the lattice enthalpy Hlatt can be calculated.īORN-HABER CYCLE Example: Sodium Bromide: Breaking down each of the stages. enthalpy of ionization, enthalpy of atomization, etc. The Born-Haber cycle consists of several steps of measurable enthalpy values e.g.TEXTBOOK Brown, Lemay & Bursten, Chemistry: The Central Science, 10th Ed.
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