A) electron affinity
B) lattice energy
C) crystal energy
D) all of these
Correct Answer: D
Solution :
Born Haber cycle is used to determine lattice energy (LE) of ionic crystals to other thermodynamics data [i.e., ionisation energy (IE), electron affinity (EA) dissociation energy (D) etc.) e.g., let us consider formation of NaCI \[Na(s)+\]sublimation energy\[(S)\xrightarrow{{}}Na(g)\] \[\frac{1}{2}C{{l}_{2}}(g)+\frac{D}{2}\xrightarrow{{}}Cl(g)\] \[Na(g)+IE\xrightarrow{{}}N{{a}^{+}}(g)+{{e}^{-}}\] \[Cl(g)+{{e}^{-}}\xrightarrow{{}}C{{l}^{-}}(g)+EA\] \[N{{a}^{+}}+(g)+C{{l}^{-}}(g)\xrightarrow{{}}NaCl+LE\] \[\Delta {{H}_{f}}=S+\frac{1}{2}D+IE+EA+LE\]
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