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OpenStudy (anonymous):
Given the following data: 2O3 -> 3O2 (enthalpy = -427 kJ) O2 -> 2O (enthalpy = +495 kJ) NO + O3 -> NO2 + O2 (enthalpy = -199 kJ) Calculate the enthalpy for the reaction NO + O -> NO2 using Hess's Law.
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