Which action would reduce the activation energy of a chemical reaction?

The activation energy can be lowered by the addition of a catalyst.

Catalyst is a substance which speeds up the reaction without itself used up in the equation.

The catalyst will be produced as it is at the end of the reaction.

Activation energy is the minimum energy that is needed for the particles which are undergoing the reaction. This energy is required by the molecules to undergo collision which leads to the chemical reaction.

The hill in the picture shows the activation energy which the molecules should possess to undergo a chemical reaction.

On adding the catalyst this energy gets lowered and the more molecules even with lesser quantity of energy can undergo the reaction.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

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