pchem_checklistkeyideas_ch07

Pchem_checklistkeyid - Atkins& de Paula Atkins’ Physical Chemistry 8e Checklist of key ideas Chapter 7 Chemical Equilibrium Chapter 7 Chemical

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Unformatted text preview: Atkins & de Paula: Atkins’ Physical Chemistry 8e Checklist of key ideas Chapter 7: Chemical Equilibrium Chapter 7: Chemical Equilibrium SPONTANEOUS CHEMICAL REACTIONS 7.1 The Gibbs energy minimum Extent of reaction, ξ , when the extent of reaction changes by a finite amount Δ ξ , the amount of A present changes from n A,0 to n A,0 – Δ ξ . reaction Gibbs energy, the slope of the graph of the Gibbs energy plotted against the extent of reaction: Δ r G = ( ∂ G / ∂ ξ ) p,T . relation of Δ r G to the chemical potentials of the species in the reaction A → B, Δ r G = μ B – μ A . Chapter 7: Chemical Equilibrium 7.1 The Gibbs energy minimum (cont..) condition of equilibrium, Δ r G = 0. exergonic reaction, a reaction for which Δ r G < 0, such a reaction can be used to drive another process. endergonic reaction, a reaction for which Δ r G > 0. 7.2 The description of equilibrium general statement of a reaction, 0 = Σ J v J J. reaction quotient, Q = Π J a J v J . Chapter 7: Chemical Equilibrium 7.2 The description of equilibrium (cont..) general expression for Δ r G at an arbitrary stage of the reaction, Δ r G = Δ r G _ + RT ln Q . standard reaction Gibbs energy, Δ r G _ = Σ Products v Δ f G o – Σ Reactants v Δ f G o = Σ J v J Δ f G o (J) . equilibrium constant, K , in terms of Δ r G o , Δ r G o = – RT ln K . thermodynamic equilibrium constant, an equilibrium constant K expressed in terms of activities (or fugacities): J J J equilibrium K a ν = ∏ Chapter 7: Chemical Equilibrium relations between equilibrium constants, K = K γ K b . equilibria in biological systems, Δ r G ⊕ = Δ r G o + 7 vRT ln 10....
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This note was uploaded on 12/12/2011 for the course CHE 301 taught by Professor Raineri,f during the Fall '08 term at SUNY Stony Brook.

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Pchem_checklistkeyid - Atkins& de Paula Atkins’ Physical Chemistry 8e Checklist of key ideas Chapter 7 Chemical Equilibrium Chapter 7 Chemical

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