Van t Hoff equilibrium box 范霍夫平衡箱 1[2园3l4kc dD+ eE fF+ gG PD PE PF PG 77 4上一内容下一内容◇回主目录 返回
上一内容 下一内容 回主目录 返回 Van’t Hoff equilibrium box
Affinity of chemical reaction 1922年,比利时热力学专家德唐德( De donder)首 先引进了化学反应亲和势的概念。他定义化学亲和势A为: def G ∑ 或A=-△G A是状态函数,体系的强度性质。用A判断化学反 应的方向具有“势”的性质,即: A>0反应正向进行 A<0反应逆向进行 A=0反应达平衡 4上-内容下一内容◆回主目录 返回
上一内容 下一内容 回主目录 返回 Affinity of chemical reaction 1922年，比利时热力学专家德唐德（De donder）首 先引进了化学反应亲和势的概念。他定义化学亲和势A为： def , B B B ( )T p G A − = − r m 或 A = - G A是状态函数，体系的强度性质。用A判断化学反 应的方向具有“势”的性质，即： A>0 反应正向进行 A<0 反应逆向进行 A=0 反应达平衡
5.2 For pg reactions aA= bB The simplest assumption is to suppose that the species are perfect gases, in which case their chemical potentials are determined by their partial p ressures △Gn=b/B-a4 -bu+rthm-8 P -akA RT In P 4上一内容下一内容◇回主目录 返回
上一内容 下一内容 回主目录 返回 5.2 For pg reactions aA ﹦bB The simplest assumption is to suppose that the species are perfect gases, in which case their chemical potentials are determined by their partial pressures: r Gm = b B − a A a A A b B B P P a RT P P b RT − − = + ln ln
Isothermal equation of chemical reaction (PB/po) △,Gm=b-0?+rh(PPy (P2/P°) =△G+RTh (P/P) 0 < Reaction proceeds Reaction is at equilibrium 4上一内容下一内容令回主目录 返回
上一内容 下一内容 回主目录 返回 Isothermal equation of chemical reaction r Gm = ( ) ( ) − + a A b B B A P P P P b a RT / / ln ( ) ( ) a A b B r m P P P P G RT / / = + ln 0 ＜ - Reaction proceeds ＝ - Reaction is at equilibrium
The chemical potential of a real gases AB(T,P)=A(T)+RTin s fB is the fugacity of B Substituting this expression, gives (△Gn)。=∑ )+∑ VBRTIn-= △G(7)=∑v4(7) (△Gn)=△G()+∑ VBRTIn A, GS(T) is the standard molar Gibbs function of the reaction 4上-内容下一内容◆回主目录 返回
上一内容 下一内容 回主目录 返回 The chemical potential of a real gases： = B r m , B B ( G ) T p B B B B B B ( ) ln f T RT p = + $ $ B B B ( , ) ( ) ln f T p T RT p = + $ $ r m B B B = G T T ( ) ( ) $ $ B r m , r m B B ( ) ( ) ln T p f G G T RT p = + $ $ is the standard molar Gibbs function of the reaction r m G T( ) $ fB is the fugacity of B Substituting this expression, gives