Video: Puas yog Delta G 0 ntawm qhov sib npaug?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib qho tshuaj tiv thaiv tsis raws cai muaj qhov zoo delta G thiab tus nqi me me K. Thaum twg delta G yog sib npaug rau xoom thiab K yog nyob ib ncig ntawm ib, cov tshuaj tiv thaiv yog nyob rau kev sib npaug . Koj tau kawm txog kev sib raug zoo ntawm ob lub zog no. Qhov kev sib raug zoo no tso cai rau peb txheeb xyuas tus qauv dawb hloov hluav taws xob hloov mus rau kev sib npaug tas li.
Hais txog qhov no, Gibbs puas pub dawb zog xoom ntawm qhov sib npaug?
Gibbs free zog yog ib qho kev ntsuas ntawm ntau npaum li cas "muaj peev xwm" cov tshuaj tiv thaiv tau tawm mus ua ib qho "ib yam dab tsi." Yog li ntawd yog hais tias tus dawb zog yog xoom , ces cov tshuaj tiv thaiv yog nyob rau kev sib npaug , tsis muaj haujlwm ntxiv tuaj yeem ua tiav. Tej zaum nws yuav yooj yim dua los pom qhov no siv lwm hom ntawv ntawm tus Gibbs free zog , xws li ΔG = -TΔS.
Ib tug kuj yuav nug, nws txhais li cas thaum Delta G yog 0? Cov tshuaj tiv thaiv tsis zoo muaj Delta G cov txiaj ntsig zoo (tseem hu ua endergonic cov tshuaj tiv thaiv). Thaum lub Delta G rau ib qho tshuaj tiv thaiv yog xoom, cov tshuaj tiv thaiv yog hais tias nyob rau hauv equilibrium. Equilibrium ua TSIS TAU txhais tau tias sib npaug concentration. Yog tias Delta G yog xoom, tsis muaj qhov hloov pauv hauv A thiab B, vim tias qhov system nyob ntawm qhov sib npaug.
Kuj tseem paub, yog Delta G tsis muaj xoom ntawm qhov sib npaug?
Raws li rxn mus rau kev sib npaug , delta G (tsis muaj tsis muaj dab tsi ) hloov vim rxn tab tom ua. Yog li thaum cov tshuaj rxn mus txog kev sib npaug , delta G (tsis muaj tsis muaj dab tsi ) txoj kev xoom . Txawm li cas los xij, delta G tsis tseem zoo li qub vim nws tseem hais txog thaum lub rxn nyob ntawm tus qauv.
Vim li cas Delta G 0 thaum lub sijhawm hloov pauv?
Aritra G . Lub zog Gibbs dawb tsis tas yuav xoom ntawm a theem hloov . Txawm li cas los xij, txij li Gibbs muaj nuj nqi nyob ntawm ib txwm muaj ntawm Thermodynamic variables p thiab T thiab txij li feem ntau theem Kev hloov pauv tshwm sim ntawm qhov tsis tu ncua p thiab T, yog li, cov molar / tshwj xeeb Gibbs muaj nuj nqi zoo li qhov tsis tu ncua thaum tus theem hloov.
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