Cov txheej txheem:
Video: Dab tsi yog hom kev sib xyaw?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov khoom xyaw tuaj yeem muab faib ua peb hom : ncua sib tov , colloidal tshuaj sib tov los yog kev daws teeb meem, raws li lawv ua ke thiab sib cais. Kev ncua sib tov muaj cov ntsiab lus loj dua, colloidal sib tov muaj ntau qhov me me, thiab cov khoom nyob rau hauv ib qho kev daws kom yaj tag rau hauv cov kuab tshuaj.
Ib yam li ntawd, nws nug, 4 hom kev sib tov yog dab tsi?
Nyob rau hauv cov qeb ntawm homogeneous thiab heterogeneous sib tov muaj ntau hom kev sib xyaw nrog rau kev daws teeb meem , hlau alloys, kev ncua , thiab colloids. Ib qho tshuaj yog ib qho sib tov uas ib qho ntawm cov tshuaj dissolves nyob rau hauv lwm yam. Cov khoom uas yaj yog hu ua daws.
Ib tug kuj yuav nug, dab tsi yog sib tov thiab nws hom? Teb: A sib tov yog kev sib xyaw ua ke ntawm ob lossis ntau yam tshuaj (cov ntsiab lus lossis cov khoom sib txuas) uas tsis ua rau tshuaj lom neeg. Cov khoom xyaw yog ob hom Homogeneous Cov khoom xyaw thiab Heterogeneous sib tov . Homogeneous Cov khoom xyaw : Ib Homogeneous sib tov muaj ib tug uniform composition ntawm nws cov khoom siv thoob plaws nws pawg.
Tom qab ntawd, ib tug kuj nug, dab tsi yog 2 hom kev sib tov?
Muaj ob hom kev sib tov : Heterogeneous thiab Homogeneous.
Dab tsi yog 10 piv txwv ntawm kev sib tov?
Lwm cov kev sib xyaw ua ke
- Haus luam yeeb thiab pos huab (Smog)
- Dej thiab av (dej)
- Xuab zeb, dej thiab pob zeb (Cement)
- Dej thiab ntsev (Hiav txwv dej)
- Potassium nitrate, sulfur, thiab carbon (Gunpowder)
- Oxygen thiab dej (Hiav txwv ua npuas ncauj)
- Petroleum, hydrocarbons, thiab roj additives (Gasoline)
Pom zoo:
Kev sib xyaw cov khoom xyaw puas yog kev hloov tshuaj?
Cov ntaub ntawv yooj yim ntawm kev sib cais thiab sib xyaw yog suav tias yog kev hloov pauv ntawm lub cev, tab sis kev sib xyaw cov khoom xyaw ntawm lub ncuav mog qab zib tsis yog ib qho kev sib xyaw yooj yim. Kev hloov tshuaj pib tshwm sim thaum cov khoom xyaw sib xyaw, tsim cov tshuaj tshiab
Puas yog Oxygen yog cov khoom sib xyaw lossis sib xyaw?
Puas yog oxygen yog ib qho khoom sib xyaw lossis sib xyaw? Oxygen yog ib yam khoom. Nws yog tsim los ntawm tib hom atom, oxygen atoms (8 protons). Nws tshwm sim kom ruaj khov tshaj li molecules ntawm muaj pes tsawg leeg
Puas yog txoj cai ntawm kev sib xyaw ua ke siv tau rau cov khoom sib xyaw?
Cov teeb meem tsis tuaj yeem tsim los yog rhuav tshem, txawm hais tias itis ib qho khoom, qhov sib xyaw, lossis sib xyaw. b) Txoj cai lij choj ntawm qhov tseeb muaj pes tsawg leeg tsuas yog siv rau cov khoom sib txuas nkaus xwb, vim hais tias nws hais txog qhov tsis tu ncua, lossis qhov tseeb, muaj pes tsawg leeg ntawm cov ntsiab lus hauv ib qho chaw
Dab tsi yog qhov sib xyaw ntawm cov khoom sib xyaw?
Ib lub tebchaw muaj cov atom ntawm cov khoom sib txawv ntawm cov tshuaj sib xyaw ua ke hauv qhov sib piv ruaj khov. Kev sib tov yog ib qho kev sib xyaw ntawm ob lossis ntau yam tshuaj uas tsis muaj tshuaj lom neeg ua ke lossis cov tshuaj tiv thaiv. Kev sib xyaw. Cov tshuaj muaj cov ntsiab lus sib txawv hauv qhov sib piv ruaj khov uas tau hais tseg los ntawm cov ntawv cog lus tshuaj
Dab tsi yog txoj cai ntawm kev sib xyaw rau cov khoom sib xyaw?
Rule of Mixtures yog ib txoj hauv kev rau kev kwv yees kwv yees ntawm cov khoom siv sib xyaw, raws li kev xav tias cov khoom sib xyaw yog qhov ntim hnyav nruab nrab ntawm cov theem (matrix thiab dispersed theem) cov khoom