Qhov Tseem Ceeb - Gas vs Vapor
Gaseous theem yog ib qho ntawm plaub theem tseem ceeb ntawm txhua yam teeb meem nrog rau theem khoom, theem ua kua thiab ntshav. Gases tuaj yeem paub meej qhov txawv ntawm cov khoom thiab cov theem ua kua vim tias, tsis zoo li hauv cov khoom khib nyiab lossis cov kua dej, cov atoms nyob rau hauv cov lus tsa suab dawb thiab kis thoob plaws hauv ib lub thawv. Gas thiab vapor ob qho tib si zoo ib yam vim lawv cov pob tshab, tab sis yog ob theem sib txawv uas qhov teeb meem tuaj yeem tshwm sim. Qhov sib txawv tseem ceeb ntawm cov pa thiab vapor yog tias cov pa tsuas muaj nyob hauv ib lub cev lub cev xwb hos vapor tuaj yeem koom nrog lwm lub cev lub cev.
Gas yog dab tsi?
Gas nyob rau hauv cov xwm txheej tuaj yeem tsim tawm ntawm ib lub caij lossis sib xyaw ntawm atoms. Txawm li cas los xij, nws yog ib qho me me molecule. Piv txwv li, yog hais tias pawg halogen nyob rau hauv lub sij hawm yog xam, fluorine thiab chlorine muaj raws li gases whereas bromine muaj raws li ib tug kua thiab iodine raws li ib tug khoom. Qhov no yog vim qhov loj ntawm lub atom yog nce los ntawm pawg halogen thiab cov molecules loj tsis tuaj yeem tau txais cov lus tsa suab dawb vim yog kev sib cuam tshuam ntawm kev sib cuam tshuam.
Gas yog ib yam khoom uas muaj nyob hauv ib lub xeev xwb, uas yog theem gaseous. Qhov no yog hu ua lub xeev thermodynamic. Lub xeev thermodynamic yog qhov xwm txheej ntawm lub kaw lus piav qhia raws li qhov ntsuas kub, qhov siab, thiab lwm yam. Gas tsis tau ntsib lub sijhawm hloov pauv, uas txhais tau hais tias nws tsuas muaj raws li cov pa roj thiab yuav tsis hloov mus rau theem tshwj tsis yog muab cov xwm txheej tshwj xeeb.. Yog li ntawd, nws yog hu ua monophasic tshuaj.
Daim duab hauv qab no qhia txog cov haujlwm txheeb ze ntawm theem gaseous thiab vapor theem. Ntawm no, lub vapor theem nyob rau hauv qhov kub thiab txias tshaj qhov tseem ceeb point kub. Lub gaseous theem nyob saum cov ntsiab lus tseem ceeb.
Daim duab 01: txheeb ze ntawm cov pa roj thiab theem vapor
Vapor yog dab tsi?
Vapor tuaj yeem txhais tau tias yog ib yam khoom uas nyob rau theem gaseous thiab tuaj yeem ua ke nrog cov kua theem. Cov ntsiab lus no zoo li tsis meej pem, tab sis qhov tshwm sim ntawm no yog qhov vapor nyob hauv qhov sib npaug nrog cov kua. Cov kua no muaj tib lub molecules li cov vapor. Vapor yog tsim los ntawm kev hloov theem, thiab nws tuaj yeem hloov mus rau theem hloov dua. Yog li ntawd, nws yog lub npe hu ua multiphasic tshuaj. Vapor tsis yog lub xeev teeb meem li roj. Kev hloov pauv ntawm cov roj mus rau hauv cov kua dej tshwm sim los ntawm condensation tom qab tsim cov kua poob thiab nws txoj kev loj hlob. Kev sib koom ua ke ntawm vapor nrog nws cov theem ua kua yog ua tau vim tias nws qhov ntsuas kub qis dua qhov tseem ceeb. Lub ntsiab lus tseem ceeb yog qhov kub thiab txias uas cov roj thiab cov kua tsis tuaj yeem sib txawv. Tsuas yog cov pa roj tuaj yeem muaj nyob saum qhov tseem ceeb; Yog li, cov roj tsis tuaj yeem ua ke nrog cov kua. Piv txwv li, chav dej yog dej vapor nyob rau hauv qhov kub thiab txias thaum chav tsev kub nws yog kua.
Ib qho piv txwv zoo rau vapor-kua sib npaug hauv cov xwm txheej ib txwm yog qhov sib npaug ntawm ethanol thiab nws cov vapor. Daim duab hauv qab no qhia tau hais tias ob theem no cuam tshuam li cas.
Daim duab 02: Vapor-Liquid Equilibrium Mixture of Ethanol thiab Dej
Qhov txawv ntawm Gas thiab Vapor yog dab tsi?
Gas vs Vapor |
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| Ib roj tuaj yeem muaj nyob hauv ib theem thermodynamic nkaus xwb. | Vapor tuaj yeem ua ke nrog nws cov theem ua kua. |
| Lub cev muaj zog | |
| Gas yog qhov tseem ceeb ntawm qhov teeb meem. | Vapor yog lub xeev ib ntus ntawm kev hloov pauv ntawm cov kua lossis cov khoom. |
| Nature | |
| Txhua cov pa roj tsis yog vapors. | Tag nrho cov vapors yog gases. |
| khoom | |
| Gases yog invisible. | Npaj tuaj yeem pom. (Piv txwv: dej vapor tuaj yeem pom zoo li huab.) |
| Phase Change | |
| Gas tsis ntsib qhov hloov pauv | Vapor experiences phase change. |
| Gas ib txwm yog roj hauv qhov xwm txheej. | Npaj yog hom roj uas tsim los ntawm cov kua lossis cov khoom. |
| Kev | |
| Gas tsis tsim. | Vapor yog tsim los ntawm boiling los yog evaporation |
| Critical Point | |
| Qhov kub ntawm cov roj yog siab dua qhov tseem ceeb. | Qhov kub ntawm qhov vapor yog qis dua qhov tseem ceeb tab sis siab tshaj qhov kub ntawm cov kua lossis cov khoom. |
| Txhob Cia Siab | |
| Gasses tsis nyob hauv av. | Vapors nyob rau hauv av. |
Summary – Gas vs Vapor
Gas nyob saum qhov chaw tseem ceeb whereas vapor nyob hauv qab ntawm qhov tseem ceeb. Tsis muaj cov kua theem tuaj yeem nyob saum qhov tseem ceeb. Vapor kuj muaj nyob hauv qab ntawm qhov tseem ceeb. Yog li ntawd, qhov sib txawv tseem ceeb ntawm cov pa roj thiab vapor yog tias cov roj muaj nyob hauv ib lub cev lub cev xwb hos vapor tuaj yeem koom nrog lwm lub cev lub cev.
