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Question

Ionisation of energy of F is 320 kJ mol1. The electron gain enthalpy of fluorine would be

A
320 kJ mol1
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B
160 kJ mol1
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C
+320 kJ mol1
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D
160 kJ mol1
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Solution

The correct option is A 320 kJ mol1
FF+e; ΔH=320 kJ or
F+eF; ΔH=320 kJ
The second process is the reverse of first process. Hence the enthalpy of the second process is the negative of the first process.

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