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2. The lattice energy of an ionic compound is the energy change when one mole of ionic solid is separated into its gaseous ions. Given the data below, find lattice energy for AlBr3, which is the ?H° for the following reaction: AlBr3(s) ? Al³?(g) + 3 Br?(g) ?H° = ? Chemical reaction ?H° in kJ/mol Type of reaction Al (s) ? Al (g) 329.10 Heat of sublimation Al (g) ? Al? (g) + e? 577.6 Ionization energy (first) Al? (g) ? Al²? (g) + e? 1816.6 Ionization energy (Second) Al²? ? Al³? (g) + e? 2744.7 Ionization energy (Third) Br2 (g) ? 2 Br (g) 193 Bond energy Br (g) + e? ? Br? (g) -325 Electron Affinity Al (s) + 3/2 Br2 (g) ? AlBr3 (s) -527.2 Heat of formation

          2. The lattice energy of an ionic compound is the energy change when one mole of ionic solid is separated into its gaseous ions. Given the data below, find lattice energy for AlBr3, which is the ?H° for the following reaction:

AlBr3(s) ? Al³?(g) + 3 Br?(g)   ?H° = ?

Chemical reaction                   ?H° in kJ/mol          Type of reaction
Al (s) ? Al (g)                     329.10                 Heat of sublimation
Al (g) ? Al? (g) + e?               577.6                  Ionization energy (first)
Al? (g) ? Al²? (g) + e?              1816.6                 Ionization energy (Second)
Al²? ? Al³? (g) + e?                 2744.7                 Ionization energy (Third)
Br2 (g) ? 2 Br (g)                  193                    Bond energy
Br (g) + e? ? Br? (g)               -325                   Electron Affinity
Al (s) + 3/2 Br2 (g) ? AlBr3 (s)    -527.2                 Heat of formation

2. The lattice energy of an ionic compound is the energy change when one mole of ionic solid is separated into its gaseous ions. Given the data below, find lattice energy for AlBr3, which is the ?H° for the following reaction:

AlBr3(s) ? Al³?(g) + 3 Br?(g) ?H° = ?

Chemical reaction ?H° in kJ/mol Type of reaction
Al (s) ? Al (g) 329.10 Heat of sublimation
Al (g) ? Al? (g) + e? 577.6 Ionization energy (first)
Al? (g) ? Al²? (g) + e? 1816.6 Ionization energy (Second)
Al²? ? Al³? (g) + e? 2744.7 Ionization energy (Third)
Br2 (g) ? 2 Br (g) 193 Bond energy
Br (g) + e? ? Br? (g) -325 Electron Affinity
Al (s) + 3/2 Br2 (g) ? AlBr3 (s) -527.2 Heat of formation

Added by Asunci-N T.

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