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5.1 The equilibrium condition of chemical reaction

Chemical reaction. a A + b B = y Y + zZ. Chapter 5 Chemical equilibrium. 5.1 The equilibrium condition of chemical reaction. Δ r G m = 0  at equilibrium ;. Δ r G m > 0  right spontaneous ;. Δ r G m < 0  left spontaneous 。. d ξ = d n B / ν B. a A + b B = y Y + zZ.

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5.1 The equilibrium condition of chemical reaction

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  1. Chemical reaction aA+bB=yY+zZ Chapter 5 Chemical equilibrium 5.1 The equilibrium condition of chemical reaction ΔrGm=0 at equilibrium; ΔrGm>0  right spontaneous ; ΔrGm<0  left spontaneous 。

  2. dξ=dnB/νB aA+bB=yY+zZ dGT,P=(yμY+zμZ-aμA-bμB)dξ dGT,P=ΔrGmdξ ΔrG=ΔrGmΔξ

  3. ΔrGm(T) 5.2 Perfect gas equilibrium aA(g) +bB (g) =yY (g) +zZ (g) ΔrGm (T) — standard molar Gibbs function change of chemical reaction

  4. At equilibrium ΔrG m =0 Standard equilibrium constant K(T)=exp[-ΔrGm (T)/RT]

  5. K > J  K < J  Ratio of partial pressure K= J  at equilibrium;

  6. Perfect gas Real gas Ideal solution and dilute solution aB=cB Pure liquid or solid aB=1 5.3 General case of a reaction aA(aA) +bB (aB) =yY (aY) +zZ (aZ)

  7. (1) (2) 5.4 Standard equilibrium constant aA(aA) +bB (aB) =yY (aY) +zZ (aZ)

  8. 5.5 Van’t Hoff equation

  9. lnK Indefinite integral equation Definite integral equation ΔrHm= constant

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