The catalytic converter in an automobile changes harmful gases produced during fuel combustion to less harmful exhaust gases. In the catalytic converter, nitrogen dioxide reacts with carbon monoxide to produce nitrogen and carbon dioxide. In addition, some carbon monoxide reacts with oxygen, producing carbon dioxide in the converter. These reactions are represented by the balanced equations below. Reaction 1: 2NO2(g) + 4CO(g) ==>N2(g) + 4CO2(g) + 1198.4 kJReaction 2: 2CO(g) + O2(g) ==>2CO2(g) + 566.0 kJ73 The potential energy diagram in your answer booklet represents reaction 1 without a catalyst. On the same diagram, draw a dashed line to indicate how potential energy changes when the reaction is catalyzed in the converter. [1] Answer to question 73 74 Determine the oxidation number of carbon in each carbon compound in reaction 2. Your response must include both the sign and value of each oxidation number. [1] HIGHLIGHT TO SEE THE ANSWER | +2 for carbon in CO and +4 for carbon in CO2 |
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