Cov txheej txheem:
Video: Cov kev hloov ntawm lub cev txawv ntawm cov tshuaj hloov pauv li cas muab ib qho piv txwv ntawm txhua tus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A tshuaj hloov tau los ntawm a tshuaj tshuaj tiv thaiv, thaum a hloov lub cev yog thaum tseem ceeb kev hloov cov ntawv tab sis tsis yog tshuaj tus kheej. Piv txwv ntawm tshuaj hloov pauv yog hlawv, ua noj, xeb, thiab rotting. Piv txwv ntawm kev hloov ntawm lub cev yog boiling, melting, freezing, thiab shredding.
Ua li no, qhov txawv ntawm lub cev thiab tshuaj hloov pauv yog dab tsi?
Cov qhov sib txawv ntawm ib lub cev tshuaj tiv thaiv thiab a tshuaj tshuaj tiv thaiv yog muaj pes tsawg leeg. Hauv ib tshuaj tshuaj tiv thaiv, muaj ib hloov nyob rau hauv muaj pes tsawg leeg ntawm cov tshuaj nyob rau hauv nqe lus nug; hauv a hloov lub cev muaj ib txawv nyob rau hauv tsos, tsis hnov tsw, los yog yooj yim tso saib ntawm ib tug qauv ntawm cov teeb meem tsis muaj a hloov nyob rau hauv muaj pes tsawg leeg.
Tom qab ntawd, lo lus nug yog, qhov txawv ntawm lub cev thiab tshuaj hloov pauv rau cov menyuam yaus yog dab tsi? Hauv kev hloov tshuaj , ib yam khoom tshiab yog tsim, zoo li thaum koj hlawv tswm ciab. Hauv kev hloov ntawm lub cev , tsis muaj cov khoom tshiab tsim, zoo li thaum dej tig mus rau dej khov.
Tom qab ntawd, lo lus nug yog, 3 qhov sib txawv ntawm lub cev thiab tshuaj hloov pauv li cas?
Hauv ib hloov lub cev , cov molecules yog rearranged thaum lawv muaj pes tsawg leeg tseem zoo ib yam. Hauv ib tshuaj hloov , molecular muaj pes tsawg leeg ntawm ib yam khoom kiag li kev hloov thiab ib qho khoom tshiab raug tsim. Ib qho piv txwv ntawm lub cev hloov ua khov ntawm dej, yaj ntawm wax, ua ntawm dej, etc.
10 chemical pauv piv txwv yog dab tsi?
Kaum piv txwv ntawm kev hloov tshuaj lom neeg yog:
- Hlawv cov thee, ntoo, ntawv, kerosene, thiab lwm yam.
- Tsim cov curd los ntawm mis nyuj.
- Electrolysis ntawm dej los tsim hydrogen thiab oxygen.
- Rusting ntawm hlau.
- Kev tawg ntawm cracker.
- Ua noj ua haus.
- Kev zom zaub mov.
- Germination ntawm noob.
Pom zoo:
Cov tshuaj hloov pauv txawv li cas ntawm cov lus nug hloov lub cev?
Qhov txawv ntawm kev hloov tshuaj thiab lub cev yog dab tsi? Kev hloov tshuaj muaj xws li kev tsim cov khoom tshiab los ntawm kev rhuav tshem thiab rov kho cov atoms. Kev hloov ntawm lub cev feem ntau yog thim rov qab thiab tsis koom nrog kev tsim cov khoom sib txawv lossis cov khoom sib txuas
Dab tsi yog cov nyhuv tshuaj ntawm hluav taws xob muab qee qhov piv txwv ntawm cov nyhuv tshuaj?
Ib qho piv txwv ntawm cov tshuaj muaj zog hauv cov hluav taws xob tam sim no yog electroplating. Hauv cov txheej txheem no, muaj cov kua dej uas muaj hluav taws xob dhau mus. qhov no yog ib qho piv txwv ntawm kev siv tshuaj lom neeg hauv hluav taws xob tam sim no
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Lub cev thiab tshuaj hloov pauv li cas nrog piv txwv?
Kev hloov tshuaj lom neeg tshwm sim los ntawm cov tshuaj tiv thaiv tshuaj, thaum lub cev hloov pauv yog thaum cov teeb meem hloov pauv tab sis tsis yog tshuaj lom neeg. Piv txwv ntawm kev hloov tshuaj lom neeg yog hlawv, ua noj, xeb, thiab rotting. Piv txwv ntawm kev hloov lub cev yog boiling, melting, khov, thiab shredding