chapter 16 example 164 effect of inert gases on

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Unformatted text preview: he mixture (Fig. 1613). Equilibrium composition at 2600 K, 5 atm x CO2 y CO z O2 8 N2 Solution A gas mixture is heated to a high temperature. The equilibrium composition at the specified temperature is to be determined. Assumptions 1 The equilibrium composition consists of CO2, CO, O2, and N2. 2 The constituents of the mixture are ideal gases. Analysis This problem is similar to Example 163, except that it involves an inert gas N2. At 2600 K, some possible reactions are O2 2O (ln KP 1 1 N2 NO (ln KP 7.521), N2 2N (ln KP 28.304), O2 2 2 1 O2 CO2 (ln KP 2.671), and CO 2.801 or KP 16.461). Based 2 on these KP values, we conclude that the O2 and N2 will not dissociate to any appreciable degree, but a small amount will combine to form some oxides of nitrogen. (We disregard the oxides of nitrogen in this example, but they should be considered in a more refined analysis.) We also conclude that most of the CO will combine with O2 to form CO2. Notice that despite the changes in pressure, the number of moles of CO and O2 and the presence of an iner...
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This note was uploaded on 06/15/2009 for the course MAE 3311 taught by Professor Hajisheik during the Summer '08 term at UT Arlington.

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