Question: can a different person answer this please- specifically part d) with the diagram :) The major pollutant gases emitted by petrol engines are carbon monoxide,
can a different person answer this please- specifically part d) with the diagram :)


The major pollutant gases emitted by petrol engines are carbon monoxide, oxides of nitrogen NOx and unburnt hydrocarbons. Catalytic converters are used to remove these from the exhaust. These are heterogeneous catalysts consisting of platinum and rhodium. The reactions that take place are: 2NO(g)+2CO(g)N2(g)+2CO2(g)2CO(g)+O2(g)2CO2(g)C7H16(g)+11O2(g)7CO2(g)+8H2O(g) For a car that has a catalytic converter: (a) Which exhaust gases are present in a significantly lower quantity as a result? (2 marks) (b) Which gas/-es, of concern in the context of global warming, is/are present in a higher concentration as a result? (1 mark) (c) The reaction: 2CO(g)+O2(g)2CO2(g) is exothermic. Explain why carbon monoxide and oxygen can coexist in the atmosphere without reacting. (1 mark) (d) Draw the reaction profile for the uncatalysed reaction at (c), and add a further curve to it to show the effect of a catalyst
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