Unit 10 Kinetics & Equilibrium Vocabulary

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Activated Complex

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A temporary, unstable arrangement of atoms that may form products or may break apart to re-form the reactants.

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Activation Energy

Back

The minimum amount of energy required to initiate a chemical reaction.

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Catalyst

Back

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.

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Collision Theory

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Chemical reactions can occur when particles collide with sufficient energy and proper orientation.

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Effective Collisions

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A collision that occurs with proper orientation and sufficient energy to start a reaction

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Enthalpy

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A measure of the total energy or heat of a chemical reaction.

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Entropy

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A measure of the disorder or randomness in a system.

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Equilibrium

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A state in which the forward and reverse reactions balance each other because they occur at equal rates;

rate of the forward reaction = rate of the reverse reaction

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Heat of the Products

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The total PE of the products in a chemical reaction.

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Heat of the Reactants

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The total PE of the reactants in a chemical reaction.