CHEM 100 Study Guide - Final Guide: Endothermic Process, Reaction Rate, Exothermic Process

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30 Oct 2014
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Rate of a reaction: the change in concentration of a reactant (or product) per unit time. Activation energy (ea): the minimum energy necessary for the reaction to happen energy diagrams: with an exothermic energy diagram: when the product is formed it releases. Factors affecting rates of reaction: 1) nature of reactions: usually reactions between ions in aqueous solutions are fast; reactions with covalent compounds are slow 2) concentration: the higher the concentration the higher the reaction rate. When concentration doubles, the reaction rate increases 3) temperature: the rate increases as the temperature increases. For every 10 c increase, the reaction rate doubles 4) catalyst: a substance that increases the reaction rate without itself being used up. Equilibrium of a reaction the rate of the forward reaction is equal to the rate of the reverse reaction. No change in concentrations, reaction is taking place just at equal speeds forward and reverse. Equilibrium constant (k) : indicates which direction the reaction goes/favors.

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