2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Txhua cov pa roj carbon atom yog sib koom ua ke rau hauv nws cov txheej txheem nrog peb daim ntawv cog lus muaj zog. Qhov no tawm hauv txhua lub atom nrog ib qho khoom siv hluav taws xob, uas ua ke tsim ib qho delocalised 'hiav txwv' ntawm electrons loosely bonding cov txheej ua ke. Cov no delocalised electrons tuaj yeem txav mus los ua ke- ua graphite ib qho hluav taws xob zoo.
Vim li cas graphite yog ib qho hluav taws xob zoo?
Nyob rau hauv ib lub graphite molecule, ib valence electron ntawm txhua cov pa roj carbon atom tseem dawb, Yog li ua graphite ib tug zoo conductor ntawm hluav taws xob. Whereas hauv pob zeb diamond, lawv tsis muaj hluav taws xob mobile dawb. Li no yuav tsis muaj ntws ntawm electrons Yog vim li cas tom qab pob zeb diamond yog tsis zoo conductor hluav taws xob.
Koj yuav ua li cas ua pov thawj tias graphite yog ib qho hluav taws xob zoo?
Kev piav qhia: Graphite tsuas yog ib qho tsis yog hlau uas siv los ua hluav taws xob thiab yog li hu ua tus neeg xyuas pib zoo ntawm hluav taws xob. Pov thawj: Siv tam sim no rau ntawm ib kawg ntawm tus cwj mem lub hau thiab kos nrog lub ntsuas ntsuas ntawm lwm qhov kawg, yog tias lub teeb ntsuas lub teeb cices graphite yog tus neeg xyuas hluav taws xob zoo.
Puas yog kua graphite yog ib tug zoo conductor ntawm hluav taws xob?
Graphite yog insoluble hauv dej. Nws muaj lub siab melting point thiab yogtus neeg xyuas pib zoo ntawm hluav taws xob, uas ua rau nws tsim nyog rau cov khoom siv hluav taws xob uas xav tau hauv electrolysis. Txhua carbon atom yog sib koom ua ke rau hauv nws txheej nrog pebmuaj zog covalent bonds.
Dab tsi yog graphite yog qhov zoo ntawm hluav taws xob?
Graphite yog ib qho 'allotropic daim ntawv' ntawm carbon. Nyob rau hauv ib lub graphite molecule, ib valence electron ntawm txhua carbon atom tseem dawb. Vim tias cov hluav taws xob dawb hauv nws lub moj khaum, graphite tuaj yeem ua hluav taws xob. Yog li ntawd, graphite tau hais tias yog ib tug zoo conductor ntawm hluav taws xob.
Pom zoo:
Dab tsi yog qhov txawv ntawm lub tshuab hluav taws xob thiab lub tshuab hluav taws xob?
Gramophone: Txhua lub suab kaw suab, lossis cov cuab yeej ua si yav dhau los-cov suab kaw, tshwj xeeb tshaj yog tias nws siv lub tiaj tiaj tiaj. Phonograph: Txhua lub suab kaw suab, lossis cov cuab yeej siv rau kev ua si cov suab uas tau kaw dhau los, tshwj xeeb tshaj yog tias nws siv lub tog raj kheej tig.
Puas siv hluav taws xob hauv qhov hluav taws xob tuaj yeem siv rau ntawm qhov loj?
Txawm hais tias tsawg dua, lwm hom kev siv hluav taws xob hauv av tuaj yeem siv los muab ntau lub zog ntau dua. Tapping qhov chaw ntawm cov dej kub faus rau hauv qab lub ntiaj teb saum npoo tuaj yeem muab cua sov rau cov neeg coob coob, thiab tsim kom muaj zog txaus los tsim hluav taws xob loj.
Puas hluav taws xob hluav taws xob puas tsim hluav taws xob?
Coal feem ntau siv roj los tsim hluav taws xobhauv Tebchaws Meskas. Hauv cov chaw tsim hluav taws xob hluav taws xob hluav taws xob, cov hluav taws xob bituminous, subbituminous thee, lossis lignite raug hlawv. Cov cua kub uas tsim los ntawm kev sib xyaw ntawm cov thee yog siv los hloov cov dej mus rau hauv qhov chaw siab zog, uas tsav lub turbine, uas tsim hluav taws xob.
Cadmium puas yog qhov zoo ntawm cov hluav taws xob thiab hluav taws xob?
Vim nws qhov ua tau zoo raws li tus neeg xyuas hluav taws xob, cadmium feem ntau siv hauv electroplating thiab hauv roj teeb. Tsis tas li ntawd, cadmium thiab cov kev daws teeb meem ntawm nws cov tebchaw yog tshuaj lom thiab yuav tsum tau ua tib zoo saib xyuas.
Lub tshuab hluav taws xob hluav taws xob tsim hluav taws xob li cas?
Piav seb lub twj hluav taws xob hluav taws xob tsim hluav taws xob hla lub membrane li cas. Los ntawm pum electrons hla lub membrane, sab uas cov electrons raug tshem tawm muaj qhov zoo dua, thaum sab tau txais cov hluav taws xob ntau muaj qhov tsis zoo.
