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Mg(g) + O(g)

Energy Changes for Mg(g) + O(g)  MgO(s). Mg 2+ (g) +O 2- (g). EA 2 of O - (g) = 844 kJ. Mg 2+ (g) + 2e - +O(g). EA of O(g) = -141 kJ. Mg 2+ (g) + 1e - +O - (g). 2 nd IE of Mg = 1451 kJ. Crystal lattice energy of MgO = -3850 kJ. Mg + (g) + e - +O(g). 1 st IE of Mg = 738 kJ.

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Mg(g) + O(g)

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  1. Energy Changes for Mg(g) + O(g)  MgO(s) Mg2+(g) +O2-(g) EA2 of O-(g) = 844 kJ Mg2+(g) + 2e- +O(g) EA of O(g) = -141 kJ Mg2+(g) + 1e- +O-(g) 2nd IE of Mg = 1451 kJ Crystal lattice energy of MgO = -3850 kJ Mg+(g) + e- +O(g) 1st IE of Mg = 738 kJ Mg(g) + O(g) Net energy change for Mg(g) + O(g) MgO(s) = -958 kJ MgO(s)

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