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2_Chemical_Equilibrium_final

2_Chemical_Equilibrium_final - Chemical Equilibrium(Chapter...

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Chemical Equilibrium (Chapter 7) CHEM 300
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Standard state Standard state is usually taken to be 1 bar, 298K, and all components having an activity (or fugacity) of 1. For an ideal solution this means a concentration of 1 mol kg -1 or 1 mol L -1 In Biochemistry, temperature is typically 298K or 310K, pressure is 1 atm, and concentration is 1 mol L -1 with the exception of protons, which are assumed to be at a concentration of 10 -7 M (pH = 7). Ion cofactors are taken to fully complexed (none free in solution). If water is a reactant, it’s concentration is taken to be 1M.
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Chemical Equilibrium Chemical reactions tend to move toward the dynamic equilibrium in which both reactants and products are present but have no tendency to undergo net change. Use thermodynamics to predict the equilibrium composition under any reaction condition. Extent of the reaction monitors the progress of the reaction
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A B Δ r G = 0 is the criterion for chemical equilibrium at constant T and P Δ r G = G ξ
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