Given the following reactions:
(1) 2NO --> N2 + O2 ∆H = -180 kJ
(2) 2NO + O2 --> 2NO2 ∆H = -112 kJ
the enthalpy of the reaction of nitrogen with oxygen to produce nitrogen dioxide
2N2 + 4O2 --> 4NO2
a. -136 kJ
c. 136 kJ
e. -292 kJ
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