energy required to ionise 2 moles of gaseous He+ ion present in its ground state is??

Dear student
Please find the solution to the asked query:

He has 2 electrons.

E =-13.6Z2n2n =1Z=2Energy = -13.6(2)2            =-13.6×4            =  - 54.4 eV

since 2 moles of ion is asked 2 x -54.4 =-108.8 eV
​Here energy cannot be negative [as it is an endothermic reaction ], so it is 108.8eV

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