29. Answer ALL parts of this question. (a) Imagine that a Born-Haber cycle is being constructed by a colleague, to deter

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29 Answer All Parts Of This Question A Imagine That A Born Haber Cycle Is Being Constructed By A Colleague To Deter 1 (81.72 KiB) Viewed 9 times

29. Answer ALL parts of this question. (a) Imagine that a Born-Haber cycle is being constructed by a colleague, to determine the lattice energy of a hypothetical magnesium halide salt, where X is the halide ion. The colleague makes the following list: First and second ionisations of Mg; 737 and 1451 Sublimation energy of Mg; 147 (b) Electron affinity of X; 200 Atomisation enthalpy of X2; 400 Enthalpy of formation of MgX2; -450 2e+ Mg +2X(g) 2e + Mg + X2 (Ⓒ) e+ + Mg + X₂ Mg() + X₂ Mg(s) + X₂ (8) Continuation of question 29: 1451 147 8 Mg + 2X MgX2 (0) Question 29 continued on page 9... Sadly the colleague becomes discouraged and leaves the document incomplete, simply drawing boxes around unknown quantities. Complete the calculation by writing down the boxed quantities a-f on your answer paper. You may assume that the units are kJ mol-¹. (8 marks) Write down any one type of energy term apart from 'pV work', which might be encompassed by the thermodynamic term of 'work'. Provide a brief one-sentence definition. (2 marks)