1.

Energy of an electron in the ground state of the hydrogen atom is -2.18 x 10-18 J. Calculate the ionization enthalpy of atomic hydrogen in terms of kJ mol-1 .

Answer»

Energy of an electron in the ground state of the hydrogen atom = -2.18 x 10-18 J

H → H+ + e- 

Energy required to ionize 1 mole of hydrogen atoms, we multiply by the Avogadro constant. 

E = 2.18 x 10-18 x 6.023 x 1023 

= 13.123 x 105 J mol-1 

I.E = +1312 K J mol-1



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