Born Haber Practice #3
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1. Draw the Born Haber Cycle and Calculate the lattice energy of NaBr given the following information:
a. ΔHsublimation Na(s) = 107 kJ/mol
b. Enthalpy of dissociation of Br2 = 97 kJ/mol
c. First ionization energy of Na = 496 kJ/mol
d. Electron affinity of Br = -325 kJ/mol
e. ΔHformation NaBr = -367 kJ/mol
2. Draw the Born Haber Cycle and Calculate the lattice energy of MgO given the following information:
a. ΔH dissociation of Oxygen = 249 kJ/mol
e. 1st electron affinity of O = -141 kJ/mol
b. ΔHsublimation Mg = 148 kJ/mol
f. 2nd electron affinity of O = 798 kJ/mol
c. 1st ionization energy of Mg = 738 kJ/mol
g. Enthalpy of formation of MgO = -602
nd
d. 2 ionization energy of Mg = 1541
kJ/mol
kJ/mol
3. Draw the Born Haber Cycle and Calculate the lattice energy for Na2O, given that:
a. ΔH˚f Na2O(s) = -416 kJ/mol
b. ΔH˚at Na(g) = +107 kJ/mol
c. ΔH˚at ½ O2(g) = +248 kJ/mol
d. ΔH˚I1 = +494 kJ/mol
e. ΔH˚ea1 = -142 kJ/mol
f. ΔH˚ea2 = +844 kJ/mol
4. Calculate the lattice energy of NaI, given the following information:
Hof[NaI(s)] = -288; Hs(Na) = 107; IE(Na) = 496; Hs(I2) = 62; D(I—I) = 149; EA[I] = -295