(a) Given that ∆U(0K) and ∆tH°(298 K) for MgO are —3795 and —6O2 kJ mol-1 respectively, de...

(a) Given that ∆U(0K) and ∆tH°(298 K) for MgO are —3795 and —6O2 kJ mol-1 respectively, derive a value for ∆EAH°(298 K) for the reaction:

O(g) +2e– ⇾ O2–(g)

Other data: see Appendices,

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(b) Compare the calculated value with that obtained using electron affinity data from Appendix 9, and suggest reasons for any differences.