Determine the enthalpy of reaction for
4 NH3(g) + 7 O2(g) → 4 NO2(g) + 6 H2O(l)
1. −1397.6 kJ/mol rxn
2. +2034.4 kJ/mol rxn
3. −1899 kJ/mol rxn
4. −298.7 kJ/mol rxn
5. −1766 kJ/mol rxn
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