Question bank/JEE Main/Chemistry
JEE MainChemistryModerateInorganic Chemistry
The electron gain enthalpy of a hypothetical element is -3
eV per atom. How much energy in kCal is released when 10 g of are
completely converted to A-
ions in gaseous state ?
(Take: 1 eV per atom = 23 kCal mol^-1, Molar mass of A = 30 g)
Show answer and solution
23
No. of moles of A= 1/3 mol
Energy released= 1/3 X 3 X 23kCal = 23 kCal
No. of moles of A= 1/3 mol
Energy released= 1/3 X 3 X 23kCal = 23 kCal
Source: Grass-G / CH-05 Chemistry Paper 10 October.docx
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