Chapter 15 Outline

Chapter 15 Outline - Joseph Chapter 15 Outline Chemical...

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Joseph Chapter 15 Outline: Chemical Equilibrium Chemical equilibrium occurs when a reaction and its reverse reaction proceed at the same rate. As a system approaches equilibrium, both the forward and reverse reactions are occurring. At equilibrium, the forward and reverse reactions are proceeding at the same rate. Once equilibrium is achieved, the amount of each reactant and product remains constant In a system at equilibrium, both the forward and reverse reactions are being carried out; as a result, we write its equation with a double arrow Because pressure is proportional to concentration for gases in a closed system, the equilibrium expression can also be written • Low activation barrier – reaction runs both ways. • Equilibrium, the amounts of reactants and products in the system stay constant (not products in the system stay constant (not necessarily the same). • But the forward and reverse reactions still continue and they go at the same rate. • Pure substances in the solid and liquid state have constant concentrations. Adding or removing some does not change the concentration because they do not expand to fill the concentration because they do not expand to fill the container or spread throughout a solution. • Therefore, these substances (s) and (l) are not included in the equilibrium constant
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This note was uploaded on 02/20/2011 for the course CHEM 101 taught by Professor John during the Spring '11 term at Caldwell College.

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Chapter 15 Outline - Joseph Chapter 15 Outline Chemical...

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