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.

$$\begin{gathered} E =-13.6\frac{Z^2}{n^2} \\ n =1 \\ Z=2 \\ Energy = -13.6(2{)}^2 \\ =-13.6\times 4 \\ = - 54.4 eV \end{gathered}$$

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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