A catalyst is a chemical that can be included in a reaction to speed up the process without being consumed. Typically, catalysts shorten the activation energy of a process or alter its mechanism.
By offering a different pathway with lower activation energy, a catalyst accelerates the reaction both forward and backward. More reactants can easily pass the energy barrier if the activation energy is decreased. As a result, the rate of reaction rises. A catalyst is a material that speeds up the rate of reaction by increasing the free energy change in the process. However, because it is not consumed by the reaction, a catalyst can be chemically retrieved unaltered after having been used to accelerate or catalyze a reaction.
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