Ch. 9, 10 - Ionic-Lewis WS Key

Ch. 9, 10 - Ionic-Lewis WS Key - Ionic Bonding and Lewis...

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Ionic Bonding and Lewis Structure Worksheet 1. Use the Born-Haber cycle to calculate the lattice energy of KF. K(s) K(g) H ° = 90 kJ K(g) K + (g) + e H ° = 419 kJ F 2 (g) 2F(g) H ° = 159 kJ H Lattice = 830 kJ K(s) + ½ F 2 (g) KF(s) H ° f = -569 kJ F(g) + e F - (g) H ° = -328 kJ 2. Use the Born-Haber Cycle to calculate the electron affinity of NaCl. Na(s) Na(g) H ° = 109 kJ Cl 2 (g) 2Cl(g) H ° = 243 kJ Na(g) Na + (g) + e H ° = 496 kJ EA= -427 kJ Na(s) + ½ Cl 2 (g) NaCl(s) H ° f = -411 kJ Na + (g) + Cl - (g) NaCl(s) H ° = -711 kJ 3. Arrange the following in order of increasing lattice energy and explain your answer: a. MgS, MgO, MgSe MgSe<MgS<MgO larger ionic radius, smaller lattice energy b. AlCl 3 , NaCl, MgCl 2 NaCl<MgCl 2 <AlCl 3 larger the charge, larger lattice energy 4. Using the bond dissociation energies, calculate the H ° rxn for the following reaction: a. CH 4 (g) + Cl 2 (g) CH
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This note was uploaded on 06/15/2010 for the course CHEM 124 taught by Professor Hascall during the Winter '08 term at Cal Poly.

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Ch. 9, 10 - Ionic-Lewis WS Key - Ionic Bonding and Lewis...

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