Rau cov tshuaj tiv thaiv kom ua tau ntawm qhov kub thiab txias, nws yuav tsum tshwm sim ntawm nws tus kheej, uas txhais tau tias tsis muaj lub zog ntxiv yuav tsum tau muab tso rau hauv qhov kev tshwm sim tshwm sim. Txhawm rau paub seb qhov tshuaj tiv thaiv puas ua tau, koj tuaj yeem suav Gibbs hloov pauv lub zog dawb (ΔG) rau qhov tshwj xeeb cov tshuaj tiv thaiv.
Koj qhia li cas yog tias cov tshuaj tiv thaiv thermodynamically nyiam?
Yog tias qhov tshuaj tiv thaiv ΔH yog qhov tsis zoo, thiab ΔS yog qhov zoo, cov tshuaj tiv thaiv ib txwm nyiam qhov ntsuas kub. Yog tias cov tshuaj tiv thaiv ΔH yog qhov zoo, thiab ΔS yog qhov tsis zoo, cov tshuaj tiv thaiv ib txwm yog qhov tsis txaus siab.
Cov tshuaj tiv thaiv thermodynamically ua tau li cas?
Tshuaj tiv thaiv yog ib kauj ruam tseem ceeb hauv kev tsim cov tshuaj feem ntau. … Yog tias tus txheej txheem muaj cov txiaj ntsig, raws li tau teev tseg los ntawm ther-modynamics, uas ntau dua lossis sib npaug ntawm cov txiaj ntsig ua kom muaj txiaj ntsig kev lag luam, ces cov tshuaj tiv thaiv yog hu ua thermodynamically ua tau.
Cov txheej txheem ntsuas kub li cas rau qhov ua tau ntawm qhov tshwm sim?
Qhov ntsuas kub ntsuas kub uas txiav txim siab tus kheej ntawm tus txheej txheem yog lub zog pub dawb. Rau ib tug txheej txheem yuav spontaneous lub dawb zog yuav tsum yog -ve.
Koj ua li cas xam qhov kub ntawm qhov kev tawm tsam ua tau?
Thaum muaj qhov tshwm sim ua tau ΔG=0. Rearrange the equation ΔG=ΔH - TΔS. Yog li ntawd thaumΔG=0, T=ΔH / ΔS. Yuav tsum hloov ΔS ntawm JK^-1mol^-1 rau kJK^-1mol^-1 los ntawm kev faib los ntawm 1000.
