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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.
In all chemical reactions, mass is always conserved... In chemical reactions, atoms rearrenge to form products... During chemical change atoms arrange and form new bonds. The new bonds are form to make the products. Chemical reactions occur when different atoms and molecules combine together and spit apart. For example, if Carbon (C) is burnt in Oxygen (O2) to form Carbon Dioxide, a <b>Chemical Reaction</b> occurs.<br />So, during chemical reactions, new product atoms are not created, and old reactant atoms are not destroyed.