b The Ostwald process for the commercial production of nitric acid from ammonia and oxygen involves the following steps: 4NH3(g) + 502(g) → 4NO(g) + 6H,O(g) (1) 2NO(g) + O2(g) → 2NO2(g) (2) 3NO2(g) + H20(1) → 2HNO3(aq) + NO(g) (3) Is the overall reaction exothermic or endothermic? exothermic endothermic

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