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Substance A reacts spontaneously with substance B at room temperature. Substance A reacts with substance C at room temperature only in the presence of a catalyst. Which statement best explains this difference?1.The reaction between substances A and B has a lower relative potential energy than the reaction between substances B and C.2.The reaction between substances A and B has a lower activation energy than the reaction between substances B and C.3.The reaction between substances A and B is exothermic..4.The reaction between substances A and B is endothermic.

Respuesta :

Explanation:

Catalyst is a chemical substance that does not participate in the chemical reaction. Decreases activation energy and increases reaction rate. The catalyst accelerates the reaction, but does not change the chemical composition of the reactants and products involved.

So, if the substance A reacts with C only with the presence of a calalyst, is because it was needed to decrease the activation energy of the reaction.

Answer: 2.The reaction between substances A and B has a lower activation energy than the reaction between substances B and C

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