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19 July, 13:12

Catalytic converters made of palladium (Pd) reduce automobile pollution by catalyzing the reaction between unburned hydrocarbons and oxygen. How does Pd increase the rate of this reaction?

A: By cooling the reactants

B: By splitting the oxygen atoms

C: By giving the hydrocarbons a negative charge

D: By decreasing the activation energy

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  1. 19 July, 13:30
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    Almost all catalysts work by lowering the activation energy of the reaction with no change in the free energy of the reaction

    - So in this case we can say that palladium reduce automobile pollution by catalyzing the reaction between un-burned hydrocarbons and oxygen:

    D. by decreasing the activation energy
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