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Calculate the energy in joules required ...

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)

Text Solution

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The correct Answer is:
`49.5`
No. of moles of Na present is 2 ⋅ 3mg of Na
`= (23)/(10) xx (1)/(1000) xx (1)/(23)= 1 xx 10^(-4)` mole
`therefore` Required energy `=1 xx 10^(-4) xx 495 xx 10^(3)= 49.5J`
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