The following reactions are common in the stratosphere:(a)
Chapter 20, Problem 91P(choose chapter or problem)
The following reactions are common in the stratosphere:
(a) \(\mathrm{NO}_2(g)\ \longrightarrow\mathrm{\ NO}(g)+\mathrm{O}(g)\)
(b) \(\mathrm{N}_2\mathrm{O}(g)\ \longrightarrow\ \mathrm{N}_2(g)+\mathrm{O}(g)\)
(c) \(\mathrm{H}_2(g)+\mathrm{O}(g)\ \longrightarrow\mathrm{\ OH}(g)+\mathrm{H}(g)\)
(d) \(\mathrm{CH}_4(g)+\mathrm{O}(g)\ \longrightarrow\mathrm{\ OH}(g)+\mathrm{CH}_3(g)\)
First, without doing any calculations, predict whether each of the reactions is endothermic or exothermic. Then estimate \(\Delta H^{\circ}\) for each reaction, and comment on your predictions and estimates.
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