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October 31, 2014

Homework Help: chemistry

Posted by Meeeee on Friday, September 14, 2012 at 7:46pm.

calculate the lattice energy of sodium oxide (Na2O) from the following data:

Ionization energy of Na(g): 495 kJ/mol

Electron affinity of O2 for 2e: 603 kJ/mol

Energy to vaporize Na(s): 109 kJ/mol

O2(g) bond energy: 499 kJ/mol

Energy change for the reaction 2Na(s)+ 1/2 O2(g)--> Na2O(s): -416 kJ/mol

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