Question

Based on the following enthalpy changes, determine the energy required to turn a Na metal atom into a gas phase ion (Na+(g)).

Ionization energy of Na(g)	495 kJ/mol
Electron affinity of O(g) for 2 e-	603 kJ/mol
Energy to vaporize Na(s)	109 kJ/mol
O2(g) bond energy	499 kJ/mol
Energy change for the reaction: 2 Na(s) + 1/2 O2(g) --> Na2O(s)	-416 kJ/mol Na2O

Answer 1

Na is metal . so it solid at room temperature . It converted to gases .

Na(s) --------------> Na(g) H = 109Kj

Na(g) --------------> Na^+ + e^-           H = 495Kj

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Na(s) -------------> Na^+ (g)              H   = 604KJ >>>>>>answer