Video: Vim li cas thiaj muaj kev hloov pauv hauv tshuaj lom neeg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub zog hloov hauv a tshuaj tiv thaiv yog vim qhov sib txawv ntawm cov nyiaj khaws cia tshuaj lub zog ntawm cov khoom thiab cov reactants. Qhov no khaws cia tshuaj zog, or kub cov ntsiab lus, ntawm qhov system yog hu ua nws enthalpy.
Tsuas yog li ntawd, dab tsi yog qhov hloov pauv ntawm cov tshuaj tiv thaiv?
Cov Kub ntawm Cov tshuaj tiv thaiv (tseem paub thiab Enthalpy ntawm Cov tshuaj tiv thaiv ) yog hloov hauv enthalpy ntawm a tshuaj tiv thaiv uas tshwm sim ntawm lub siab tsis tu ncua. Nws yog ib chav ntsuas thermodynamic ntawm kev ntsuas muaj txiaj ntsig zoo rau kev suav cov nqi zog ntawm ib lub mole yog tso tawm lossis tsim tawm hauv tshuaj tiv thaiv.
Ib yam li ntawd, dab tsi tshwm sim thaum tshav kub kub muaj cov tshuaj tiv thaiv? Nce qhov kub tsub kom cov tshuaj tiv thaiv ntau ntxiv vim yog qhov tsis txaus ntseeg loj ntawm kev sib tsoo ntawm lub zog loj. Nws tsuas yog cov kev sib tsoo no xwb (muaj tsawg kawg yog lub zog ua kom muaj zog rau cov tshuaj tiv thaiv) uas ua rau muaj kev cuam tshuam.
Ib sab ntawm qhov no, vim li cas cov cua sov feem ntau ntxiv rau cov tshuaj tiv thaiv tshuaj?
Lo lus nug: Yog vim li cas cua sov feem ntau ntxiv rau cov tshuaj tiv thaiv Ua nyob rau hauv Laboratory? Yog li ntawd Cov kev sib tsoo ntawm Reacting Molecules muaj zog ntau dua kom lawv tuaj yeem kov yeej Activation Energy Barriers. Yog Lub Cov tshuaj tiv thaiv Yog Endothermic, Kub Ua kom txo qis kev hloov pauv hauv Entropy.
Vim li cas qhov kub ntawm cov tshuaj tiv thaiv tseem ceeb?
Enthalpy yog tseem ceeb vim nws qhia peb ntau npaum li cas kub (lub zog) yog nyob rau hauv ib qho system. Kub yog tseem ceeb vim peb tuaj yeem rho tawm haujlwm tseem ceeb ntawm nws. Nyob rau hauv cov nqe lus ntawm ib tug tshuaj tshuaj tiv thaiv , ib qho kev hloov pauv enthalpy qhia peb ntau npaum li cas enthalpy ploj lossis tau txais, enthalpy txhais tau tias kub lub zog ntawm qhov system.
Pom zoo:
Vim li cas tom qab kev hloov pauv kev hloov pauv tseem ceeb?
Kev hloov pauv tom qab kev txhais lus (PTMs) xws li glycosylation thiab phosphorylation ua lub luag haujlwm tseem ceeb ntawm kev ua haujlwm ntawm hemostatic proteins thiab tseem ceeb heev hauv kev teeb tsa kab mob. Xws li theem nrab hloov pauv rau cov proteins hemostatic muaj ntau yam cuam tshuam rau lawv lub peev xwm los cuam tshuam nrog lwm cov proteins
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system
Cov kev soj ntsuam soj ntsuam dab tsi qhia tias muaj kev hloov tshuaj lom neeg tshwm sim?
Kev soj ntsuam uas qhia tias muaj kev hloov pauv tshuaj muaj xws li kev hloov xim, hloov pauv kub, lub teeb muab tawm, tsim ua npuas, tsim cov nag lossis daus, thiab lwm yam
Puas muaj kev hloov pauv ntawm lub cev lossis tshuaj lom neeg thaum muaj suab thaj yaj hauv dej?
Dissolving qab zib hauv dej yog ib qho piv txwv ntawm kev hloov lub cev. Nov yog vim li cas: Kev hloov tshuaj lom neeg tsim cov khoom siv tshuaj tshiab. Txhawm rau kom qab zib hauv dej los ua cov tshuaj hloov pauv, ib yam tshiab yuav tsum tau ua. Yog tias koj evaporate cov dej los ntawm cov kua qab zib-dej, koj nyob nraum nrog qab zib
Yuav ua li cas thaum muaj tshuaj lom neeg lossis lub cev hloov pauv?
Kev hloov tshuaj lom neeg tshwm sim los ntawm cov tshuaj tiv thaiv tshuaj, thaum lub cev hloov pauv yog thaum cov teeb meem hloov pauv tab sis tsis yog tshuaj lom neeg. Piv txwv ntawm kev hloov tshuaj lom neeg yog hlawv, ua noj, xeb, thiab rotting. Piv txwv ntawm kev hloov lub cev yog boiling, melting, khov, thiab shredding