Energy of an electron in the ground state of hydrogen atom is -2.18 xx 10^(-18) J. Calculate the inoisation enethalpy of atomic hydrogen in J mol^(-1).

Energy of an electron in the ground state of hydrogen atom is -2.18 xx

1.	Energy of an electron in the ground state of hydrogen atom is -2.18 xx 10^(-18) J. Calculate the inoisation enethalpy of atomic hydrogen in J mol^(-1).
Answer» Solution :Energy of an electron at INFINITY is taken as zero. therefore The energy needed to REMOVE an electron from ground STATE to infinity = energy at infinity- Energy at ground state = `0 - (-2.18 xx 10^(-18)J)= 2.18 xx 10^(-18)J` IONISATION energy per mol of hydrogen = `2.18 xx 10^(-18) xx 6.02 xx 10^23/1000 = 1312.35 KJ mol^(-1)`