At high temperatures, such as those in the combustion chambers of automobile engines, nitrogen and oxygen form nitrogen monoxide: N₂(g) + O₂(g) → 2 NO(g) NO Any NO released into the environment is oxidized to NO₂: 2 NO(g) + O₂(g) →→2 NO₂(g) AH comb = -112 kJ Is the overall reaction, be AH Comb = +180 kJ N₂(g) + 2 O₂(g) →→→2 NO₂(g) exothermic or endothermic? What is AH comb for this reaction?

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Chapter1: Chemical Foundations
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6.137. At high temperatures, such as those in the combustion
chambers of automobile engines, nitrogen and oxygen form
nitrogen monoxide:
N₂(g) + O₂(g) → 2 NO(g) AHcomb = +180 kJ
Any NO released into the environment is oxidized to NO₂:
2 NO(g) + O₂(g) → 2 NO₂(g) AHComb = -112 kJ
Is the overall reaction,
N₂(g) + 2O₂(g) →→2 NO₂(g)
exothermic or endothermic? What is AH comb for this
reaction?
120
Transcribed Image Text:6.137. At high temperatures, such as those in the combustion chambers of automobile engines, nitrogen and oxygen form nitrogen monoxide: N₂(g) + O₂(g) → 2 NO(g) AHcomb = +180 kJ Any NO released into the environment is oxidized to NO₂: 2 NO(g) + O₂(g) → 2 NO₂(g) AHComb = -112 kJ Is the overall reaction, N₂(g) + 2O₂(g) →→2 NO₂(g) exothermic or endothermic? What is AH comb for this reaction? 120
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