Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But...

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Nitrogen and oxygen do not react appreciably at roomtemperature, as illustrated by our atmosphere. But at hightemperatures, the reaction below can proceed to a measurableextent. N2(g) + O2(g) â‡” 2 NO(g) At 3000 K, the reaction above hasKeq = 0.0153. If 0.1852 mol of pure NO is injected into anevacuated 2.0-L container and heated to 3000K, what will be theequilibrium concentration of NO?

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3.8 Ratings (644 Votes)

Â Â N2(g)Â Â Â Â Â +Â Â Â Â Â Â Â O2(g)Â Â Â Â <====>Â Â Â Â Â Â Â 2 NO(g)

initialÂ Â Â Â Â Â Â Â Â Â Â Â 0 MÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0 MÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.1852/2 = 0.0926 M

changeÂ Â Â Â Â Â Â Â x MÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â x MÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2x

equiliÂ Â Â Â Â Â Â Â Â Â Â x M Â Â x M Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.0926-2x

Keq = [NO]^2/[N2][O2]

0.0153 = (0.0926-2x)^2/x^2

x = 0.0436 M

at equilibrium

[N2] = x = 0.0436 M , [O2] = 0.0436 M

[NO] = 0.0926-2*0.0436 = 0.0054 M

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Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But...

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