Fugacity

17/10/2019 13) Tuesday "Glany to God" is Fugacity used to find is the the chemical behaviour potential of the ,which real gas ast related to Gibbs free energy. whichick ic used to ford the real gas mixture. itself. For an ideal gas the fogacity is the pressure Daston's Law of portial pressr P1 P= Pit B + P3 + tPic G1 G3 93 PV= nRuT G, J P2 P= nRuT also V= NRUT P V pe R,RuT + N2 RuT + N3RUT + + NK PUT P, P P P. P. (n, + nb + n3 + + nk) RuT P also, p nRuT Re P n But x(p) Go H-Ts Gn H1-TSL En Rut Gv Hv-TSV P= n ( G. (w T (su-se) total ED Hv-the sub AL-The eg: Ple, Ncos (P total = Co2 En / Alt.

a too phase mixcture x CA=0.0007 Phase I// Equillibrium water vapan (@ 45 and satuation pressure) CA = ligil Bphase 112.00 : figacity of fx > fB G=H=Ts (Gibbr free energy GL=Gm equatin) at equillibran = Gt = HL-TSL Gr F Hv-Tsv Getting Hr- TSV= HL-TSL T.S. Hv Hu-HL = TSV-TSL Hu-th T(Sv-Se) Hr-H = (Sv-SL) AH = AS Forth 64 PC T b. PIC AH= AS = Stole do The a T By first Law: du= do-dw do = dutation v(ven 200 du= T.ds-p.dv h= utpu a coupon dh= dut d(PV) b 0869 PAR Re dh = dut pdwtv.dp. dh. T.ds - Psku tpdu + sadp

the due Ridnet - dh= T.ds + vidp G= H-TS dG= = dh - dits) dG= ah - Tds sdT dG: T ds. Tds-sdT + vdd dG= vdd - sat (during phase thonomists T=c) dt=0 dGF v.dp Now Pre-RT If= RT EP v.dp dG ideal = RT dp P dayig) = RT dp P (dG(ig)= RT SH Grig) RT in(p) AGreal RT in(f) f is the fugocity / which denotes when the to that of ided gas. change in Gibbs free every , compared &