APFIVE Born-Haber Cycle For Calcium Oxide
Which sequence of thermochemical steps correctly represents the Born-Haber cycle used to determine the lattice energy of CaO?
A
Ca(s)→Ca(g)→Ca⁺(g)→Ca²⁺(g); O₂(g)→2O(g)→2O⁻(g); Ca²⁺(g)+O²⁻(g)→CaO(s)
B
Ca(s)→Ca²⁺(g)+2e⁻; ½O₂(g)+2e⁻→O²⁻(g); Ca²⁺(g)+O²⁻(g)→CaO(s)
C
Ca(s)+½O₂(g)→CaO(s); CaO(s)→Ca²⁺(g)+O²⁻(g); Ca²⁺(g)→Ca(s); O²⁻(g)→½O₂(g)
D
CaO(s)→Ca²⁺(g)+O²⁻(g); Ca²⁺(g)→Ca⁺(g)→Ca(g)→Ca(s); O²⁻(g)→O(g)→½O₂(g)
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