Cov txheej txheem:
Video: Dab tsi yog graphite muaj nyob rau hauv sib xws nrog hlau?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nws yog qhov tshwj xeeb uas nws muaj cov khoom ntawm cov hlau thiab cov hlau tsis yog hlau: nws hloov tau yooj yim tab sis tsis elastic, muaj qhov kub thiab txias. hluav taws xob conductivity , thiab yog heev refractory thiab chemically inert. Graphite muaj qhov tsis tshua muaj adsorption ntawm X-rays thiab neutrons ua nws cov khoom siv tshwj xeeb hauv kev siv nuclear.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi hlau muaj nyob rau hauv sib xws nrog graphite?
Graphite muaj delocalised electrons, ib yam li hlau . Cov electrons no dawb txav ntawm cov khaubncaws sab nraud povtseg hauv graphite , yog li graphite tuaj yeem ua hluav taws xob. Qhov no ua rau graphite pab tau rau electrodes hauv roj teeb thiab rau electrolysis.
Ib tug kuj yuav nug, vim li cas pob zeb diamond thiab graphite muaj lub cev sib txawv? Vim tias lawv yog ob qho tib si ua los ntawm carbon lawv tshuaj muaj zog yog tib yam. Graphite muaj ib txheej txheej zoo li cov qauv nrog txhua txheej uas muaj hexagonal rings, qhov no yog vim hais tias tag nrho cov pa roj carbon atoms yog sp2 hybridised. Pob zeb diamond muaj tetrahedral qauv txij li tag nrho cov carbon atoms yog sp3 hybridised.
Yog li ntawd, cov khoom ntawm graphite yog dab tsi?
Lub cev muaj zog ntawm graphite
- muaj lub siab melting point, zoo ib yam li cov pob zeb diamond.
- muaj qhov muag muag, nplua zoo, thiab siv rau hauv cov xaum thiab ua cov roj nplaum qhuav rau cov khoom xws li cov xauv.
- muaj qhov ntom ntom dua li pob zeb diamond.
- yog insoluble nyob rau hauv dej thiab organic solvents - rau tib yam vim li cas pob zeb diamond yog insoluble.
Vim li cas graphite tsis yog hlau?
Hauv graphite , cov pa roj carbon atoms tau koom ua ke thiab muab tso rau hauv txheej. Cov kev sib txuas ntawm cov pa roj carbon atoms hauv txheej yog muaj zog, tab sis cov kev sib txuas ntawm cov txheej txheem tsis muaj zog. Cov khaubncaws sab nraud povtseg yooj yim plam ib leeg. Graphite yog tsis yog- hlau thiab nws tsuas yog qhov tsis yog hlau uas tuaj yeem ua hluav taws xob.
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