Catalysts (OCR A-Level Chemistry A): Flashcards

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Catalysts
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Effect of catalyst on reaction rate

Increases rate while remaining chemically unchanged

Catalyst fate during reaction

Not used up; regenerated at end

How catalysts speed up reactions

Alternative pathway with lower activation energy EaE_a

Effect of catalyst on ΔH\Delta H

No change; only affects activation energy

Homogeneous catalyst physical state

Same physical state as reactants

Heterogeneous catalyst physical state

Different physical state from reactants

Haber process catalyst

Iron, Fe(s)

Contact process catalyst

Vanadium(V) oxide, V2O5\text{V}_2\text{O}_5(s)

Catalytic converter function

Converts toxic CO, NO, hydrocarbons to safer products

Autocatalysis definition

Product of reaction acts as catalyst for same reaction

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