Use the Data Given Below to Construct a Born-Haber Cycle

Use the data given below to construct a Born-Haber cycle to determine the bond energy of O₂.
$$\begin{array} { l r } & \Delta H ^ { \circ } \left( \mathrm { kJ } \mathrm { mol } ^ { - 1 } \right) \\\mathrm { Na } ( s ) \rightarrow \mathrm { Na } ( g ) & 107 \\\mathrm { Na } ( g ) \rightarrow \mathrm { Na } ^ { + } ( g ) + \mathrm { e } ^ { - } & 496 \\\mathrm { O } ( g ) + \mathrm { e } ^ { - } \rightarrow \mathrm { O } ^ { - } ( g ) & - 141 \\\mathrm { O } ^ { - } ( g ) + \mathrm { e } ^ { - } \rightarrow \mathrm { O } ^ { 2 - } ( g ) & 878 \\2 \mathrm { Na } ( s ) + \frac { 1 } { 2 } \mathrm { O } 2 ( g ) \rightarrow \mathrm { Na } 2 \mathrm { O } ( s ) & - 416 \\2 \mathrm { Na } ^ { + } ( g ) + \mathrm { O } ^ { 2 - } ( g ) \rightarrow \mathrm { Na } 2 \mathrm { O } ( s ) & - 2608\end{array}$$

A) 426 kJ mol^-1
B) 249 kJ mol^-1
C) 852 kJ mol^-1
D) 498 kJ mol^-1
E) 356 kJ mol^-1

Correct Answer:

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