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When a catalyst is involved in the collision between the reactant molecules, less energy is required for the chemical change to take place, and hence more collisions have sufficient energy for reaction to occur. The reaction rate therefore increases.Collision theory is closely related to chemical kinetics.hen a catalyst is involved in the collision between the reactant molecules, less energy is required for the chemical change to take place, and hence more collisions have sufficient energy for reaction to occur. The reaction rate therefore increases. Collision theory is closely related to chemical kinetics.
What is a chemical equilibrium? If a chemical reaction happens in a container where one or more of the reactantsreactants: substances present at the start of a chemical reaction or productsproduct: A product is a substance formed in a chemical reaction. can escape, you have an open system.