Vanadium(V) oxide (V₂O₅) is used as a catalyst in the Contact process. Which statement best explains how it acts as a catalyst?

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Question

Vanadium(V) oxide (V₂O₅) is used as a catalyst in the Contact process. Which statement best explains how it acts as a catalyst?

Accepted Answer

B: It provides an alternative reaction pathway with lower activation energy — A catalyst works by providing an alternative reaction pathway that has a lower activation energy, allowing more molecules to react at a given temperature. Vanadium(V) oxide can do this because vanadium can change its oxidation state (from +5 to +4 and back), allowing it to participate in and facilitate the reaction without being permanently consumed.

Answer

C: It increases the concentration of reactants

Answer

B: It provides an alternative reaction pathway with lower activation energy

Answer

A: It raises the activation energy of the reaction

Answer

D: It permanently bonds to the reactants to speed up the reaction

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