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Catalyzed reactions have a lower activation energy (rate-limiting free energy of activation) than the corresponding uncatalyzed reaction, resulting in a higher reaction rate at the same temperature

Catalysts work by providing an (alternative) mechanism involving a different transition state and lower activation energy. Consequently, more molecular collisions have the energy needed to reach the transition state. Hence, catalysts can enable reactions that would otherwise be blocked or slowed by a kinetic barrier. The catalyst may increase reaction rate or selectivity, or enable the reaction at lower temperatures. This effect can be illustrated with a Boltzmann distribution and energy profile diagram.

in bio chemical reaction enzymes are catalyst and do same work as normal catalyst.

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What chemical reaction is an enzyme?

The enzyme is a biochemical catalyst.


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No, not all biochemical reactions require a catalyst. However, catalysts can help accelerate the rate of biochemical reactions by lowering the activation energy required for the reaction to proceed.


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What type of catalysts effect biochemical reactions?

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A catalyst enables more particles to reach the activation energy and to take part in the reaction. Therefore the speed of the reaction increases.


How does the presence of a catalyst affect the enthalpy change of a reaction?

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yes. lowers it.


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