Question

Why energy needed to convert 4 moles of Na to Na+ more than energy needed to convert 2 moles of Na to Na2+?
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Answer 1

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Energy needed to convert 1 mole of sodium (g) to sodium ions = 495 kJ

∴ Energy needed to convert 3 mole of Na (g) to Na  

+

 ions = 495 × 3 = 1485 kJ

Explanation: