Glossary of Chemistry Chapter 17 and 18 Test Vocab
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- a type of catalyst that slows down the reaction rate of a chemical reaction or prevents a reaction from happening
- the state in which forward and reverse reactions balance each other because they occur at equal rates
- chemical equilibrium
- describes the ratio of product concentrations to reactant concentrations, with each raised to the power corresponding to its coefficient in the balanced equation
- equilibrium constant
- The change in concentration of a reactant or product per unit time, generally calculated and expressed in moles per liter per second.
- reaction rate
- A numerical value that relates reaction rate and concentration of reactant at a specific temperature.
- specific rate constant
- A short-lived, unstable arrangement of atoms that may break apart and re-form the reactants or may form products; also sometimes referred to as the transition state.
- activated complex
- The complete sequence of elementary steps that make up a complex reaction.
- reaction mechanism
- The minimum amount of energy required by reacting particles in order to form the activated complex and lead to a reaction.
- activation energy
- Can take place in both forward and reverse; leads to an equilibrium state where the forward and reverse reactions occur at equal rates and the concentrations remain constant.
- reversible reaction
- A substance that increases the rate of a chemical reaction by lowering activation energies but is not itself consumed in the reaction.
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