Atomic StructureHard

Question

Ionisation energy of Cl- is 349 kJ mol-1. The electron gain enthalpy of chlorine would be :-

Options

A.-349 kJ mol-1
B.-175 kJ mol-1
C.+ 349 kJ mol-1
D.+ 175 kJ mol-1

Solution

Ionisation enthalpy of Cl- and electron gain enthalpy of chlorine are numerically equal with opposite sign.

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