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

question 38

Multiple Choice

Use the data given below to construct a Born-Haber cycle to determine the heat of formation of KCl.
$$\begin{array} { l c } & \Delta H ^ { \circ } \left( \mathrm { kJ } \text { mol} ^ { - 1 } \right) \\\mathrm { K } ( s ) \rightarrow \mathrm { K } ( g ) & 89 \\\mathrm {~K} ( g ) \rightarrow \mathrm { K } ^ { + } ( g ) + \mathrm { e } ^ { - } & 418 \\\mathrm { Cl } 2 ( g ) \rightarrow 2 \mathrm { Cl } ( g ) & 244 \\\mathrm { Cl } ( g ) + \mathrm { e } ^ { - } \rightarrow \mathrm { Cl } ^ { - } ( g ) & - 349 \\\mathrm { KCl } ( s ) \rightarrow \mathrm { K } ^ { + } ( g ) + \mathrm { Cl } ^ { - } ( g ) & 717\end{array}$$

• A)-1119 kJ mol^-1
• B)-997 kJ mol^-1
• C)-437 kJ mol^-1
• D)+631 kJ mol^-1
• E)+158 kJ mol^-1

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