Catalyst

 

A substance that speeds up a reaction without undergoing any permanent chemical change.

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A chemical species or other structure that facilitates a chemical reaction without itself undergoing a permanent change

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A compound that changes the rate of a chemical reaction without participating in the reaction. Catalysts usually speed a reaction up or allow it to take place at a lower temperature. They are extremely important in chemical and petrochemical processes and in environmental applications, such as cleaning up the exhaust from a car.

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A chemical species or other structure that facilitates a chemical reaction without itself undergoing a permanent change.

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A substance that increases the rate of a chemical reaction by reducing the activation energy, but which is left unchanged by the reaction. A catalyst works by providing a convenient surface for the reaction to occur. The reacting particles gather on the catalyst surface and either collide more frequently with each other or more of the collisions result in a reaction between particles because the catalyst can lower the activation energy for the reaction.

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A subtance that increases the rate of a chemical reaction by reducing the activation energy, but which is left unchanged by the reaction. A catalyst works by providing a convenient surface for the reaction to occur. The reacting particles gather on the catalyst surface and 1) collide more frequently with each other, 2) more of the collisions result in a reaction between particles because the catalyst can lower the activation energy for the reaction.

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A chemical species or other structure that facilitates a chemical reaction without itself undergoing a permanent change.

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Increases the rate of a chemical reaction and therefore reduces the amount of energy used in the reaction. The catalyst itself does not under go a chemical change

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A substance that increases the rate of a chemical reaction by reducing the activation energy, but which is left unchanged by the reaction. A catalyst works by providing a convenient surface for the reaction to occur. The reacting particles gather on the catalyst surface and either collide more frequently with each other or more of the collisions result in a reaction between particles because the catalyst can lower the activation energy for the reaction.

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