Video: Dab tsi ntawm colloid yog roj hmab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Roj hmab kev lag luam: Latex yog ib colloidal kev daws ntawm negatively them roj hmab cov khoom. Los ntawm latex, roj hmab tuaj yeem tau los ntawm coagulation.
Ib yam li ntawd, roj hmab puas yog colloid?
Cov kua mis uas oozes tawm ntawm lub roj hmab tsob ntoo, hu ua "latex", yog a colloid (los yog sol) ib yam li mis nyuj. Nws muaj microscopic roj hmab particles faib nyob rau hauv dej nruab nrab. Ntuj roj hmab yog solidified (coagulated) kua latex.
Qhov thib ob, hom colloids yog dab tsi? Kev faib tawm Colloids Cov hom colloids muaj xws li sol, emulsion, ua npuas ncauj, thiab aerosol. Sol yog a colloidal suspension nrog cov khoom siv hauv cov kua. Ua npuas ncauj yog tsim thaum muaj ntau cov pa hauv cov kua los yog khoom. Aerosol muaj cov khoom me me ntawm cov kua lossis cov khoom tawg hauv cov roj.
Kuj nug, hom colloid yog npuas roj hmab?
Khoom ua npuas ncauj : Cov khoom ua npuas ncauj yog a colloid nyob rau hauv uas ib tug gas yog dispersed nyob rau hauv ib tug khoom nruab nrab. Piv txwv. Rwb thaiv tsev ua npuas ncauj , ua npuas ncauj roj hmab thiab Sponge. Gel: Cov gel yog ib qho khoom siv semi-solid colloid nyob rau hauv uas muaj ib tug nruam network ntawm cov khoom uas dispersed nyob rau hauv ib tug kua.
Dab tsi yog 5 piv txwv ntawm colloids?
Hom colloids Colloids muaj nyob rau hauv lub neej txhua hnub. Qee qhov piv txwv suav nrog whipped cream, mayonnaise, mis nyuj , butter , gelatin, jelly, av nkos dej , plaster, xim iav, thiab ntawv. Txhua colloid muaj ob ntu: colloidal hais thiab qhov nruab nrab dispersing.
Pom zoo:
Dab tsi ua rau colloid ua colloid?
Nyob rau hauv chemistry, ib tug colloid yog ib tug sib tov nyob rau hauv uas ib yam khoom ntawm microscopically dispersed insoluble los yog soluble hais raug tshem tawm thoob plaws lwm yam khoom. Yuav kom tsim nyog raws li ib tug colloid, qhov sib tov yuav tsum yog ib qho uas tsis khom los yog yuav siv sij hawm ntev heev los khom nqi
Dab tsi yog qhov kev xav ntawm kinetic txoj kev xav ntawm cov pa roj?
Cov qauv kinetic yooj yim tshaj plaws yog ua raws li cov kev xav tau tias: (1) cov pa roj yog tsim los ntawm ntau cov molecules zoo tib yam txav mus rau hauv cov lus qhia random, sib cais los ntawm qhov deb uas loj piv nrog lawv qhov loj; (2) cov molecules undergo zoo kawg nkaus elastic kev sib tsoo (tsis muaj zog poob) nrog rau ib leeg thiab nrog rau
K tus nqi ntawm cov roj hmab band yog dab tsi?
Teb thiab piav qhia: Lub caij nplooj ntoos hlav tsis tu ncua ntawm cov roj hmab band yog k = 45.0N / m
Thaum lub ntim ntawm ib qho piv txwv ntawm cov pa roj yog txo lub siab ntawm cov qauv ntawm cov pa roj?
Kev txo qis Cov pa roj sib xyaw txoj cai hais tias lub siab ntawm cov pa roj yog inversely cuam tshuam nrog lub ntim thiab ncaj qha ntsig txog qhov kub thiab txias. Yog tias qhov kub thiab txias yog nyob tas li, qhov sib npaug raug txo rau Boyle txoj cai. Yog li ntawd, yog tias koj txo qhov siab ntawm cov roj av tas li, nws qhov ntim yuav nce ntxiv
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua