Calculate the energy in joules required to convert all the atoms of sodium to sodium ions present in 2.3 mg of sodium vapours? Ionization enthalpy of sodium is `495 kJ "mol"^(-1 )` (Atomic mass of Na = 23)

Answer

`49.5 J`

Explanation

No of moles of Na present is 2.3 mg of Na = `(23)/(10) xx (1)/(1000) xx (1)/(23) =1 xx 10^(-4) ` mole
`:.` Required energy =1 xx ` 10^(-4) xx 495 xx 10^(3)= 49.5 J`