Sublimation vs Evaporation
Muaj cov txheej txheem los ntawm qhov teeb meem hloov pauv nws daim ntawv, thiab qhov xwm txheej ib txwm muaj teeb meem hauv lub xeev ua ntej hloov mus rau hauv lub xeev liquefied thiab tom qab ntawd hloov mus rau hauv lub xeev gaseous. Txawm li cas los xij, muaj cov khoom uas tau hloov mus rau hauv lub xeev vapor yam tsis tau hloov mus rau hauv daim ntawv ua kua los ntawm lawv cov khoom muaj zog. Qhov no yog hu ua sublimation whereas evaporation yog ib txheej txheem uas tsuas yog siv rau cov kua thaum lawv hloov mus rau hauv lub xeev vapor. Muaj qhov zoo sib xws hauv kev nkag siab tias ob qho tib si cuam tshuam txog qhov teeb meem tau hloov mus rau hauv lub xeev gaseous tab sis muaj ntau qhov sib txawv. Kab lus no sim qhia txog qhov sib txawv ntawm sublimation thiab evaporation.
Sublimation yog dab tsi?
Raws li tau piav qhia saum toj no, sublimation tau hais tias tau tshwm sim thaum cov khoom siv hloov mus rau hauv cov roj yam tsis tau dhau los ntawm lub xeev ua kua ua ntej nws hloov mus ua vapor. Qhov piv txwv zoo tshaj plaws ntawm sublimation hauv lub neej niaj hnub yog qhov hlawv ntawm camphor. Thaum peb nqa lub teeb matchstick ze ntawm ib daim ntawm camphor (khoom lub xeev), nws ntes hluav taws thiab tau hloov mus rau hauv nws cov vapors yam tsis tau nkag mus rau hauv nruab nrab, kua hauv lub xeev. Ib yam li ntawd, kev hloov pauv ntawm cov pa roj carbon dioxide khov rau hauv nws daim ntawv gaseous yog hu ua sublimation.
Evaporation yog dab tsi?
Lub sij hawm vaporization tsuas yog siv rau cov dej uas nws hloov mus rau hauv dej vapor nrog lossis tsis siv cov cua sov. evaporation yog txheej txheem uas tshwm sim tsuas yog nyob rau saum npoo ntawm dej tsis muaj daim ntawv thov ntawm tshav kub qhov twg vaporization uas tshwm sim nrog daim ntawv thov ntawm tshav kub yog hu ua boiling, thiab tsis evaporation. Nws yog cov txheej txheem ntawm evaporation uas ua rau cov dej hauv av hauv av ua kom txias thiab ziab khaub ncaws ntub hauv huab cua kuj tshwm sim vim evaporation.
Nquag, hauv lub xeev ua kua, muaj qhov sib xyaw ua ke uas ua rau cov molecules sib raug zoo thiab lawv tsis pub dawb tawm ntawm cov kua dej. Tab sis cov molecules uas nyob ze ntawm qhov chaw muaj tsawg dua qhov kev nyiam no thiab tseem muaj lub zog kinetic txaus kom tawm ntawm qhov chaw thiab tawm mus rau hauv huab cua. Txawm li cas los xij, qhov kev faib ua feem ntawm cov molecules rau tag nrho cov lej ntawm cov molecules yog qhov tsawg heev nrog qhov tshwm sim uas evaporation tshwm sim ntawm qhov ntsuas me me thiab qeeb qeeb. Nrog rau qee lub zog kinetic ntawm cov kua tau dhau los ntawm cov molecules, qhov kub ntawm cov kua txo qis (xws li cov av hauv av thiab thaum peb xav tias txias dua thaum hws tawm ntawm peb lub cev).
Qhov txawv ntawm Sublimation thiab Evaporation yog dab tsi?
• Kev hloov ntawm lub xeev ntawm cov teeb meem rau nws theem gaseous yog ib qho zoo sib xws ntawm evaporation thiab sublimation
• Thaum nyob rau hauv ib txwm muaj, cov khib nyiab thawj zaug hloov mus rau hauv cov kua hauv lub xeev thiab tom qab ntawd mus rau hauv cov vapors, muaj qee cov khib nyiab (xws li camphor thiab cov pa roj carbon dioxide khov) uas hloov mus rau hauv vapors yam tsis tau dhau los ntawm cov kua nruab nrab, uas yog hu ua sublimation..
• Ntawm qhov tod tes, evaporation yog hais txog cov kua uas tig mus rau hauv lawv cov vapors yam tsis siv cov cua sov thiab feem ntau siv rau dej.
