Video: Sublimation tshwm sim qhov twg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Sublimation yog endothermic theem hloov uas tshwm sim ntawm qhov kub thiab txias hauv qab cov khoom siv peb npaug ntawm nws daim duab qhia theem. Hauv thermodynamics, triple point ntawm ib yam khoom yog qhov kub thiab txias uas peb theem (gas, kua, thiab khoom) coexist nyob rau hauv thermodynamic equilibrium.
Tom qab ntawd, ib tug kuj yuav nug, qhov twg sublimation tshwm sim nyob rau hauv lub ntiaj teb?
Public domain. Sublimation tshwm sim yooj yim dua thaum muaj qee yam huab cua, xws li cov av qis thiab cua qhuav. Sublimation kuj tshwm sim ntau nyob rau ntawm qhov chaw siab dua, qhov twg huab cua siab tsawg dua ntawm qhov siab qis. Lub zog, xws li lub hnub ci zog, kuj xav tau.
Tsis tas li ntawd, dab tsi yog qhov piv txwv ntawm lub neej tiag tiag ntawm sublimation? Muaj ntau piv txwv ntawm sublimation hauv lub neej txhua hnub : Cov cua fresheners siv hauv chav dej. Cov khoom maj mam sublimes thiab tso cov ntxhiab tsw qab ntxiag hauv chav dej nyob rau qee lub sijhawm. Npauj npaim, ua los ntawm naphthalene yog siv los tsav cov npauj thiab lwm yam kab.
Hais txog qhov no, puas sublimation tshwm sim hauv qhov xwm txheej?
Thaum twg sublimation tshwm sim , cov khoom ua tsis mus dhau cov kua theem. Lub zog yuav tsum tau ua kom muaj zog rau sublime rau hauv cov pa roj. Hauv xwm , tshav kub uas tsim los ntawm lub hnub ci feem ntau yog lub zog qhov chaw. Ib qho piv txwv ntawm sublimation yog li cas cov dej khov qhuav reacts thaum raug rau qhov nruab nrab ntawm chav tsev kub thiab siab.
Vim li cas sublimation tsis tshua muaj?
Sublimation tshwm sim thaum tag nrho cov siab ntawm cov cua yog tsawg tshaj li lub vapor siab ntawm compound, thiab melting tseem tsis tau tshwm sim vim nws tsis kub txaus. Cov tebchaw sib txawv muaj qhov sib txawv vapor pressures. Melting kub yog tsim rau hauv ib yam khoom. Nws tsuas yog nyob ntawm lub ntiaj teb sab nraud xwb.
Pom zoo:
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