Lub xeev gaseous ntawm cov khoom yog ib qho tshwm sim nthuav heev, nrog rau cov khoom uas tau txais ntau yam khoom muaj txiaj ntsig. Piv txwv li, gases tau yooj yim compressed. Lawv hloov mus rau qhov ntim thiab cov duab ntawm lub tank lawv tau ntim. Vim li cas qhov no tshwm sim? Vim li cas cov pa roj compresses yooj yim? Qhov no yuav piav qhia txog science li cas? Tshawb nrhiav hauv kab lus!
Vim li cas gases compress tau yooj yim?
Scuba dhia dej yog kev dhia dej hauv qab thaum tus neeg dhia dej dhia hauv qab dej nrog lub tank ntim nrog cov pa oxygen. Lub siab nyob rau hauv feem ntau siv scuba iav yog nruab nrab ntawm 200 thiab 300 atmospheres.
Gases txawv ntawm lwm lub cev lub cev ntawm cov khoom uas lawv nyiam nthuav dav hauv txoj hauv kev xws li rov ua cov duab thiab sau tag nrho cov ntim ntawm cov dej. Txawm li cas los xij, nyob rau hauv sib piv rau qhov no, cov pa roj kuj tuaj yeem raug compressed nyob rau hauv xws li ib tug me me npaum li cas ntawm lawv yuav raug yuam mus rau hauv lub reservoir nrog ib tug me me ntim. Yog li, yog tias huab cua los ntawm tus qauvscuba tank yog pauv mus rau lwm lub thawv nrog lub atmospheric siab ntawm 1 cua, ces lub ntim ntawm lub thawv no yuav tsum yog li ntawm 2500 litres.
Gas ceev thiab compressibility
Compressibility yog ib qho kev ntsuas ntawm ntau npaum li cas qhov ceev thiab ntim ntawm cov khoom tuaj yeem hloov pauv thaum muab tso rau hauv siab. Yog tias peb nias rau ntawm cov khoom lossis cov kua, qhov tseem ceeb tsis muaj qhov hloov pauv hauv ntim. Cov atoms, ions, lossis cov molecules uas ua rau cov khoom los yog kua yog nyob ze rau ib leeg. Tsis muaj qhov chaw nruab nrab ntawm tus kheej cov khoom, yog li lawv tsis tuaj yeem condense.
Kinetic-Molecular Theory piav qhia vim li cas cov pa roj tau yooj yim compressible (tshwj xeeb tshaj yog thaum piv rau cov kua lossis cov khib nyiab). Gases nyiam compress tau yooj yim vim tias lawv yog qhov loj ntawm qhov chaw khoob ntawm cov pa. Qhov no yog vim li cas gas yog yooj yim compressed. Nyob rau hauv chav tsev kub thiab tus qauv siab, qhov nruab nrab qhov deb ntawm cov roj molecules yog li kaum npaug ntawm txoj kab uas hla ntawm cov molecules lawv tus kheej. Thaum cov roj compressed, zoo li thaum sau lub tank scuba, cov khoom txav mus ze rau ib leeg.
Daim ntawv thov ntawm cov khoom muaj zog ntawm cov pa roj
compressed gases yog siv rau ntau lub sijhawm. Hauv tsev kho mob, compressed oxygen feem ntau yog muab rau cov neeg mob uas muaj lub ntsws puas los pab lawv ua pa. Yog tias tus neeg mob tab tom ua haujlwm loj, ces cov tshuaj loog feem ntau yuav yog xenon, uas yog, siv cov roj compressed. Vuam xav tau hluav taws kub heev tsim los ntawm compressesacetylene thiab oxygen mix. Muaj ntau cov hniav nyiaj hniav kub tau siv los ntawm compressed propane.
Summarizing
Gases compress yooj yim dua li cov khib nyiab lossis kua vim tias muaj ntau qhov chaw khoob ntawm lawv cov molecules. Cov cuab yeej ntawm cov roj no tau siv dav hauv ntau thaj chaw ntawm tib neeg lub neej.
