Qhov sib txawv tseem ceeb ntawm qhov ruaj khov thiab metastable yog tias lo lus ruaj khov yog hais txog lub xeev ntawm cov khoom siv tsis hloov pauv tiag tiag thaum lub sij hawm metastable yog hais txog lub xeev ntawm cov khoom uas qhov kev hloov pauv tsis tuaj yeem pom vim qhov hloov qeeb dhau. yuav tsum tau saib.
Cov ntsiab lus ruaj khov thiab metastable yog siv feem ntau hauv chemistry ntawm lub cev kom tau txais lub tswv yim ntawm lub xeev ntawm cov khoom siv / khoom uas peb tuaj yeem piav qhia txog qhov hloov pauv lossis tsis hloov pauv ntawm cov khoom ntawd. Lub sij hawm metastable yog siv thaum peb tuaj yeem soj ntsuam qhov tsis hloov pauv vim qhov hloov pauv qeeb heev uas tshwm sim, uas tsis tuaj yeem pom thaum xub thawj pom.
Stable yog dab tsi?
Lub sij hawm ruaj khov yog hais txog theem ntawm qhov teeb meem uas tsis hloov pauv tiag tiag. Hauv lwm lo lus, nws yog lub xeev qhov teeb meem tuaj yeem muaj lub zog tsawg tshaj plaws, lossis nws yog lub zog qis tshaj plaws ntawm qhov teeb meem rau lub cev muaj zog. Lub xeev no hu ua av state. Cov duab hauv qab no qhia txog qhov ruaj khov, tsis ruaj khov thiab metastable lub xeev ntawm cov teeb meem hauv lub cev muaj zog.
Daim duab 01: Thermodynamic Stability ntawm cov teeb meem hauv ib qho system
Metastable yog dab tsi?
Lub sij hawm metastable yog hais txog theem ntawm cov teeb meem uas pom meej tsis hloov tab sis tsis hloov tiag tiag. Hauv lwm lo lus, lo lus no yog siv rau cov tshuab uas peb tsis tuaj yeem soj ntsuam qhov kev hloov pauv hauv qhov system vim tias qhov hloov pauv qeeb dhau los ua kom pom. Qhov tshwm sim uas tham txog qhov metastable qhov system hu ua metastability.
Tsis zoo li cov theem ruaj khov ntawm cov teeb meem, theem metastable muaj lub zog loj heev hauv lub cev muaj zog thaum piv rau qib qis zog uas ua tau rau qhov system ntawd. Cov duab hauv qab no qhia tau hais tias lub kaw lus muaj ob qho tib si metastable thiab ruaj khov theem ntawm teeb meem.
Daim duab 02: Txoj hauj lwm 1 yog hais txog theem metastable ntawm teeb meem thaum txoj hauj lwm 3 sawv cev rau theem ruaj khov ntawm teeb meem; txoj hauj lwm 2 sawv cev rau lub zog thaiv qhov teeb meem nyob rau hauv txoj hauj lwm 1 yuav tsum dhau mus kom tau ruaj khov.
Lub xeev metastable ntawm cov teeb meem tuaj yeem muaj los ntawm cov khoom tawg, cov kua kub kub thiab cov khoom subliming mus rau cov kua txias txias lossis cov kua roj sib xyaw ua kua superheated. Feem ntau, cov theem metastable ntawm cov teeb meem muaj nyob rau hauv condensed teeb meem thiab crystallography.
Qhov txawv ntawm Stable thiab Metastable yog dab tsi?
Cov ntsiab lus ruaj khov thiab metastable yog siv rau hauv lub cev chemistry thiaj li tau txais lub tswv yim ntawm qhov hloov pauv ntawm cov khoom siv. Qhov sib txawv tseem ceeb ntawm qhov ruaj khov thiab metastable yog tias lub sij hawm ruaj khov yog hais txog lub xeev ntawm cov khoom siv tiag tiag tsis hloov pauv thaum lub sij hawm metastable yog hais txog lub xeev ntawm cov khoom siv uas qhov kev hloov pauv tsis tuaj yeem pom vim qhov hloov pauv qeeb dhau los ua kom pom. Hauv lwm lo lus, lub sij hawm ruaj khov piav txog qhov tsis hloov pauv ntawm qhov teeb meem, thaum lub sij hawm metastable piav txog qhov tsis hloov pauv ntawm qhov teeb meem. Ntxiv mus, ruaj khov muaj qhov qis tshaj qhov ua tau lub zog thaum metastable muaj qhov sib piv siab zog.
Hauv qab infographic tabulates qhov sib txawv ntawm qhov ruaj khov thiab metastable rau kev sib piv ntawm ib sab.
Summary – Stable vs Metastable
Cov ntsiab lus ruaj khov thiab metastable yog siv rau hauv lub cev chemistry thiaj li tau txais lub tswv yim ntawm qhov hloov pauv ntawm cov khoom siv. Qhov sib txawv tseem ceeb ntawm qhov ruaj khov thiab metastable yog tias lub sij hawm ruaj khov yog hais txog lub xeev ntawm cov khoom siv tiag tiag tsis hloov pauv thaum lub sij hawm metastable yog hais txog lub xeev ntawm cov khoom siv uas qhov kev hloov pauv tsis tuaj yeem pom vim qhov hloov pauv qeeb dhau los ua kom pom.
