Catalysts - Key terms



ACTIVATION ENERGY:

The minimal energy required to convert reactants intoproducts, symbolized E a

AQUEOUS SOLUTIONS:

A mixture of water and a substance that is dissolved in it.

CATALYST:

A substance that speeds upa chemical reaction without participating in it, either as a reactant or product. Catalysts are thus not consumed in the reaction.

CHEMICAL REACTION:

A process whereby the chemical properties of a substance are changed by a rearrangement of the atoms in the substance.

COLLISION MODEL:

The theory that chemical reactions are the result of collisions between molecules strong enough to break bonds in the reactants, resulting in are formation of atoms.

HETEROGENEOUS CATALYSIS:

A reaction in which the catalyst and the reactants are in different phases of matter.

HOMOGENEOUS CATALYSIS:

A reaction in which catalyst and reactants are in the same phase of matter.

PRODUCT:

The substance or substances that result from a chemical reaction.

REACTANT:

A substance that interacts with another substance in a chemical reaction, resulting in a product.

SYSTEM:

In chemistry and other sciences, the term "system" usually refers to any set of interactions isolated from the rest of the universe. Anything outside of the system, including all factors and forces irrelevant to a discussion of that system, is known as the environment.

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