3.15 Energy of an electron in the ground state of the hydrogen atom is
–2.18×10–18J. Calculate the ionization enthalpy of atomic hydrogen in terms of
J mol.
Hint: Apply the idea of mole concept to derive the answer.
The energy of an electron in the ground state of the hydrogen atom is –2.18 × 10 J.
Therefore, the energy required to remove that electron from the ground state of hydrogen
atom is 2.18 × 10 J.
Ionization enthalpy of atomic hydrogen = 2.18 × 10 J
Hence, ionization enthalpy of atomic hydrogen in terms of J mol–1
= 2.18 × 10 × 6.02 × 10 J mol
= 1.31 × 106
J mol
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