38) Use the data given below to construct a Born-Haber cycle to determine the bond energy of O2. ΔH°(kJ mol-1)
Na(s) → Na(g) 107
Na(g) → Na⁺(g) + e⁻ 496
O(g) + e⁻ → O⁻(g) -141
O⁻(g) + e⁻ → O2⁻(g) 878
2Na(s) +
O2(g) → Na2O(s) -416
2Na⁺(g) + O2⁻(g) → Na2O(s) -2608
A) 426 kJ
B) 249 kJ
C) 852 kJ
D) 498 kJ
E) 356 kJ
Correct Answer:
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