CHM 041 Chapter 14 PDF

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Taught by Professor Greg Ferguson...

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Chapter 14 ● Chemical equilibrium is achieved when the rates if the rates of the forward and reverse reactions are equal and the concentrations of the reactants and products remain constant ● Physical equilibrium, equilibrium between two phases of the same substance, the changes that occur are physical processes ● Equilibrium constant (K) is the mathematical expression of the law of mass action, which holds that for a reversible reaction at equilibrium and a constant temperature, a certain ratio of reactant and product concentrations has a constant value, K ● Homogeneous equilibrium applies to reactions in which all reacting species are in the same phase ● Heterogeneous equilibrium results from a reversible reaction involving reactants and products that are in different phases ● Tor reactions that have not reached equilibrium we obtain the Reaction Quotient (Qc), instead of the equilibrium constant by substituting the initial concentrations into the equilibrium constant expression ● La Chatlier’s Principle states that if an external stress is applied to a system at equilibrium, the system adjusts in such a way that the stress (change in concentration, pressure, volume, or temperature) is partially offset as the system reaches a new equilibrium position...