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

Please find the solution to the asked query:

He has 2 electrons.

$E=-13.6\frac{{Z}^{2}}{{n}^{2}}\phantom{\rule{0ex}{0ex}}n=1\phantom{\rule{0ex}{0ex}}Z=2\phantom{\rule{0ex}{0ex}}Energy=-13.6(2{)}^{2}\phantom{\rule{0ex}{0ex}}=-13.6\times 4\phantom{\rule{0ex}{0ex}}=-54.4eV$

since 2 moles of ion is asked 2 x -54.4 =-108.8 eV

â€‹Here energy cannot be negative [as it is an endothermic reaction ], so it is 108.8eV

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