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Thermodynamic Analysis of Potassium Oxide Formation and Ionization Energies

This document delves into the thermodynamic processes involved in the formation of potassium oxide (K2O) from potassium (K) and oxygen (O). It covers key elements such as electron affinities, ionization enthalpies, lattice energies, and bond dissociation energies. The calculations detail the contributions of each process to the overall enthalpy change for the formation reaction, providing insights into the stability and reactivity of potassium oxide under various conditions.

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Thermodynamic Analysis of Potassium Oxide Formation and Ionization Energies

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  1. 2K+(g) + O-2(g) ∆Helect affin2 O- 2K+(g) + e- + O(g) ∆Helect affin1 O 2 ∆Hion K 2K(g) + O(g) 2K+(g) + O-(g) ½ ∆Hbond diss O2 2K(g) + 1/2O2(g) ∆Hlattice K2O 2 ∆Hsub K 2K(s) + 1/2O2(g) ∆Hf K2O K2O(s)

  2. ∆Hf K2O= 2∆sub K + ½ ∆HdissO2 + ∆Haffin-1O + 2∆ion K + ∆Haffin-2O- + ∆HlattK20 -363.2kJ = 2(89.99)kJ +1/2(495) + (-141) +2(419)kJ + (X) + (-2238)kJ X = + 750 kJ

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