Question: Nitric acid, a source of many nitrogen compounds, is produced from nitrogen dioxide. An old process for making nitrogen dioxide employed nitrogen and oxygen. N2(g)

Nitric acid, a source of many nitrogen compounds, is produced from nitrogen dioxide. An old process for making nitrogen dioxide employed nitrogen and oxygen.
N2(g) + 2O2(g) → 2NO2(g)
The reaction absorbs 66.2 kJ of heat per 2 mol NO2 produced. Is the reaction endothermic or exothermic? What is the value of q?

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