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4 solutions

Born Haber Cycle

Q. From the following sequence, calculate the lattice energy of AB(s): A(s) → A+(g) + e- 610 kJ/mol; B(g) + e- → B-(g) -260 kJ/mol; A(s) + B(g) → AB(s) -569 kJ/mol

Solved • Jul 25, 2019

Born Haber Cycle

Q. The lattice energy of potassium iodide is the energy required for the following reaction. KI(s) -> K+(g) + I-(g) ΔHrxn = ΔHlattice Use the Born-Haber cycle to calculate the ΔHlattice for KI(s) from the information given below. Equation 1: 2K(s) + I2(g) -> 2KI(s) ΔH1 = -655 kJ/mol Equation 2: K(s) -> K(g) ΔH2 = 89 kJ/mol Equation 3: I2(g) -> 2I(g) ΔH3 = 214 kJ/mol Equation 4: K(g) -> K+(g) + e- ΔH4 = 419 kJ./mol Equation 5: I(g) + e- -> I-(g) ΔH5 = -294 kJ/mol

Solved • Jul 18, 2019

Born Haber Cycle

Q. Use the data given below to construct a Born-Haber cycle to determine the lattice energy of CaO. DH°(kJ) Ca(s) → Ca(g) 193 Ca(g) → Ca⁺(g) + e⁻ 590 Ca⁺(g) → Ca2⁺(g) + e⁻ 1010 2 O(g) → O2(g) -498 O(g) + e⁻ → O⁻(g) -141 O⁻(g) + e⁻ → O2⁻(g) 878 Ca(s) + O2(g) → CaO(s) -635

Solved • Jun 7, 2019

Born Haber Cycle

Q. Calculate the energy changes (in kj/mol) for the formation of CaCl. use the follow: Eea for Cl= -348.6 kJ/mol Ei1 for Ca= +589.8 kJ/mol Ei2for Ca= +1145 kJ/mol Heat of sublimation for Ca= +178.2 k

Solved • Mar 28, 2019