Cov txheej txheem:
Video: Yuav ua li cas cov kuab tshuaj volatile nyob rau hauv lub laboratory?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Flamable cov kuab tshuaj yog khaws cia rau hauv lub txee hluav taws kub, kom deb ntawm lwm yam tshuaj. Cov tshuaj no yuav tsum yog tuav nrog saib xyuas thiab ib txwm nrog cov hnab looj tes tsim nyog, tiv thaiv qhov muag, thiab a lab lub tsho tiv thaiv lub cev. Rau cov tshuaj txaus ntshai dua, cov kws tshawb fawb siv cov hnab looj tes tuab dua lossis cov txheej tiv thaiv ntxiv.
Hais txog qhov no, koj ua li cas cov kuab tshuaj nyob rau hauv ib chav kuaj?
Thaum tuav cov kuab tshuaj, cov kev ceev faj hauv qab no yuav tsum tau ua:
- Khaws cov kuab tshuaj rau hauv cov thawv uas muaj zog, kaw.
- Qhia meej meej thiab sau cov thawv ntim.
- Tsim cov txheej txheem thiab txoj kev khiav tawm thaum muaj hluav taws kub los yog hnyav hnyav.
- Hnav khaub ncaws tiv thaiv.
- Siv lub tshuab ua pa.
Dab tsi yog qhov teeb meem kev nyab xeeb tshaj plaws hauv chav kuaj? Cov teeb meem kev nyab xeeb hauv chav kuaj
- Cia cov ntaub ntawv combustible nyob ze ntawm lub qab nthab.
- Cia cov corrosive, flammable, los yog tshuaj lom neeg saum lub ntsej muag qhov siab.
- Tsis tiav / tsis tsim nyog daim ntawv lo ntawm cov kua khib nyiab.
- Cov ntawv sau tsis zoo ntawm cov khoom siv daws teeb meem lossis cov ntim khoom thib ob.
- Faded daim ntawv lo los yog daim ntawv ntog tawm.
- Degraded yas ntim tshuaj.
Tsis tas li ntawd, qhov twg yog qhov chaw nyab xeeb tshaj plaws los khaws cov tshuaj tsis haum tshuaj?
Khw muag khoom volatile toxics thiab odoriferous tshuaj nyob rau hauv ventilated txee. Thov xyuas nrog koj ib puag ncig kev noj qab haus huv thiab kev nyab xeeb cov neeg ua haujlwm rau kev taw qhia tshwj xeeb. Khw flammable kua nyob rau hauv pom zoo flammable kua cia txee. Cov kua nplaum me me tuaj yeem yog khaws cia hauv chav qhib.
Cov teebmeem ntawm cov kuab tshuaj yog dab tsi?
Nws muaj ntau yam teeb meem xws li lub sij hawm luv luv xws li kev hnov lus, tsaus muag, mob thiab kiv taub hau, mus rau lub sijhawm ntev cuam tshuam rau kev puas tsuaj rau lub hlwb, lub plawv, daim siab , raum thiab tej zaum yuav tuag. Qee cov kuab tshuaj tuaj yeem ua rau lub ntsws khov, yog li ua rau tuag taus.
Pom zoo:
Yuav ua li cas rau lub zog nyob rau hauv ib tug endothermic cov tshuaj tiv thaiv?
Cov tshuaj tiv thaiv kab mob endothermic tshwm sim thaum lub zog siv los rhuav tshem cov ntawv cog lus hauv cov reactants ntau dua li lub zog muab tawm thaum cov ntawv cog lus tsim hauv cov khoom. Qhov no txhais tau hais tias tag nrho cov tshuaj tiv thaiv yuav siv lub zog, yog li ntawd muaj qhov kub thiab txias hauv ib puag ncig
Lub npe rau ib yam khoom tsim nyob rau hauv cov tshuaj tiv thaiv tshuaj yog dab tsi?
Cov tshuaj tiv thaiv tshuaj yog cov txheej txheem uas cov atoms tam sim no nyob rau hauv cov tshuaj pib rov ua kom muab cov tshuaj sib xyaw tshiab tam sim no hauv cov tshuaj tsim los ntawm cov tshuaj tiv thaiv. Cov tshuaj pib ntawm cov tshuaj tiv thaiv tshuaj hu ua reactants, thiab cov tshuaj tshiab uas tshwm sim hu ua cov khoom
Yuav ua li cas tshwm sim rau atoms nyob rau hauv cov tshuaj tiv thaiv raws li Dalton lub atomic txoj kev xav?
Dalton's Atomic Theory Tag nrho cov atoms ntawm ib lub caij yog tib yam. Cov atoms ntawm cov ntsiab lus sib txawv sib txawv hauv qhov loj thiab loj. Cov tshuaj yog tsim los ntawm kev sib txawv ntawm cov lej sib txawv ntawm cov atoms. Cov tshuaj tiv thaiv tshuaj ua rau muaj kev hloov pauv ntawm cov atoms hauv cov reactant thiab cov khoom sib txuas
Vim li cas cov qauv ntawm cov dej ua rau nws muaj cov kuab tshuaj zoo?
Dej muaj peev xwm yaj ntau yam khoom sib txawv, uas yog vim li cas nws yog ib qho hnyav hnyav. Cov dej molecules muaj lub ntsiab lus ntawm cov pa oxygen thiab hydrogen atoms - ib sab (hydrogen) muaj qhov zoo hluav taws xob thiab lwm sab (oxygen) muaj qhov tsis zoo
Puas yog cov ntsiab lus uas muaj cov tshuaj lom neeg zoo sib xws yuav pom nyob rau tib lub sijhawm lossis hauv tib pab pawg piav qhia koj cov lus teb?
Qhov no yog vim hais tias cov tshuaj muaj zog nyob ntawm tsis muaj valence electrons. Raws li nyob rau hauv ib pawg tag nrho cov ntsiab lus muaj tib yam tsis muaj valence electron uas yog vim li cas lawv muaj cov tshuaj zoo sib xws tab sis nyob rau hauv ib lub sij hawm tsis muaj valence electron sib txawv uas yog vim li cas lawv txawv nyob rau hauv chemical zog