Calculate the ionization energy of hydrogen atom using Bohr’s theory.
Solution: For a single electron moving around a heavy nucleus: E = Rh/n^2, where Rh is the Rydberg constant, 2.18x10^-18 J E(1) = 2.18x10^-18 J. This is the energy for one H atom. E(1) = (2.18x10^-18 J/atom) x (6.02x10^23 atoms/mol) x (1kJ/1000J) E(1) = 1312 kJ/mol – for 1 mole of atoms. Answer: 1312 kJ/mol.
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