Video: Yuav ua li cas koj twv seb lub cim ntawm entropy?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Entropy nce thaum koj mus los ntawm cov khoom mus rau cov kua rau roj, thiab koj tuaj yeem ua tau kwv yees seb entropy kev hloov pauv yog qhov zoo lossis tsis zoo los ntawm kev saib cov theem ntawm cov reactants thiab cov khoom. Thaum twg muaj qhov nce ntawm cov roj moles, entropy yuav nce.
Dhau li ntawm no, dab tsi yog lub cim ntawm entropy?
qhov twg kos npe ntawm ΔG nyob ntawm qhov kos npe ntawm cov kev hloov hauv enthalpy (ΔH) thiab entropy (ΔS). Cov kos npe ntawm ΔG yuav hloov ntawm qhov zoo mus rau qhov tsis zoo (lossis vice versa) qhov twg T = ΔH / ΔS. Nyob rau hauv rooj plaub uas ΔG yog: qhov tsis zoo, cov txheej txheem yog qhov tshwm sim thiab tuaj yeem ua mus rau pem hauv ntej raws li tau sau tseg.
Ib yam li ntawd, dab tsi cuam tshuam rau entropy? zog hauv ib qhov system. Lub entropy ntawm ib yam khoom nce nrog nws qhov hnyav molecular thiab complexity thiab nrog kub . Lub entropy kuj nce ntxiv thaum lub siab los yog concentration ua me. Entropies ntawm cov pa roj ntau ntau dua li cov theem condensed.
Tsuas yog li ntawd, koj yuav txiav txim siab npaum li cas entropy?
Cov khoom muaj cov microstates tsawg tshaj plaws thiab yog li qis tshaj entropy . Cov kua dej muaj microstates ntau dua (vim cov molecules tuaj yeem txhais tau) thiab yog li muaj a siab dua entropy . Thaum ib yam khoom yog ib qho roj nws muaj ntau ntau microstates thiab yog li muaj cov siab tshaj entropy . Kev sib xyaw ntawm cov khoom yuav ua rau kom nce entropy.
Qhov unit ntawm entropy yog dab tsi?
The SI chav tsev rau Entropy (S) yog Joules per Kelvin (J/K). Tus nqi zoo dua ntawm entropy txhais tau hais tias ib qho tshuaj tiv thaiv yuav tshwm sim spontaneously.
Pom zoo:
Yuav ua li cas koj twv seb qhov kev tshwm sim yog endothermic los yog exothermic?
Yog hais tias lub zog theem ntawm cov reactants siab tshaj lub zog theem ntawm cov khoom, cov tshuaj tiv thaiv yog exothermic (lub zog tau raug tso tawm thaum lub sij hawm cov tshuaj tiv thaiv). Yog hais tias lub zog theem ntawm cov khoom yog siab tshaj lub zog theem ntawm cov reactants nws yog ib tug endothermic cov tshuaj tiv thaiv
Koj ua si twv seb qhov kev sib raug zoo li cas?
Tus tsim tawm: Omar Wagih
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