Lawv paub tias yog kua cov cov khoom thiab cov khoom uas tshwm sim hauv lub xeev cov teeb meem no. Peb paub tias muaj peb lub xeev tuaj yeem hais txog qhov teeb meem: khoom, kua thiab roj. Cov no txawv ntawm qib ntawm kev sib koom ua ke ntawm cov molecules uas sau nws.
Hauv lub xeev kua, cov muaj zog txaus nyiam ntawm cov molecules tsis muaj zog tshaj li ntawm cov khib nyiab tab sis muaj zog dua hauv cov nkev. Cov molecules txav thiab sib tsoo nrog ib leeg, vibrating thiab swb ib leeg.
Hauv cov kua,tus naj npawb ntawm cov khoom ib chav ntim yog siab heev, yog li kev sib tsoo thiab kev sib txhuam ntawm cov khoom tau nquag heev. Txawm hais tias cov khoom nyob hauv cov kua, khoom lossis lub xeev muaj roj ntau nyob ntawm qhov ntsuas kub thiab nws cov pa siab. Hauv thaj tsam huab cua ntawm lub ntiaj teb, piv txwv li, dej tshwm sim hauv lub xeev ua kua.
Txawm hais tias nyob hauv cov kua molecules tuaj yeem txav thiab sib tsoo nrog ib leeg, lawv nyob ze. Raws li qhov kub ntawm cov kua nce, lub zog ntawm nws tus kheej cov molecules kuj nce ntxiv.
Yog li ntawd, cov kua tuaj yeem ntws mus rau qhov zoo ntawm lawv cov thawv ntim khoom, tab sis lawv tsis tuaj yeem yoog tau yooj yim vim tias cov lwg me me twb tau khi nruj. Tias yog vim li cas cov kua tsis muaj lub cev ruaj khov, tab sis lawv muaj ntim. Cov kua yuav raug nthuav tawm thiab cov txheej txheem sib cog.
Saib kuj: Piv Piv Txwv
Cov yam ntxwv tseem ceeb ntawm cov kua ua kua muaj xws li: Kub taw tes, uas yog qhov kub uas nws rhaub thiab dhau los ua lub xeev muaj roj, qhov no yog muab los ntawm cov pa siab (uas sib npaug ntawm qhov nruab nrab uas nyob ib puag ncig cov kua).
Lwm yam khoom tshwj xeeb ntawm cov kua yog:
- Cov nto nro, muab los ntawm lub zog txaus nyiam hauv txhua qhov kev qhia hauv cov kua
- Cov siab viscosity, uas sawv cev rau qhov kev tawm tsam quab yuam ntawm cov kua mus rau kev hloov pauv tangential (qhov no tsuas yog qhia nws tus kheej hauv kev txav kua)
- Cov capillarity, cov uas piav qhia yooj yim npaum li cas nws yog cov kua dej kom dhau los ntawm txoj kab uas hla me me (capillaries), uas qhov kev sib koom ua ke tau siab dua los ntawm cov nplaum nplaum.
Nws tuaj yeem pab koj:
- Piv txwv ntawm cov khib nyiab, kua thiab roj cua
- Piv txwv ntawm Xeev Gaseous
Piv txwv ntawm cov tshuaj ua kua ntawm 25 ° C yog:
- Dej
- Roj av
- roj av
- ethyl cawv
- methanol
- Roj av ether
- chloroform
- cov benzene
- sulfuric kua qaub
- hydrochloric kua qaub
- glycerin
- acetone
- ethyl acetate hmoov
- phosphoric acid
- cov toluene
- kua qaub
- mis
- edible roj muab
- isoamyl cawv
- paj noob hlis
