Cov txheej txheem:
Video: Cov kev soj ntsuam soj ntsuam dab tsi qhia tias muaj kev hloov tshuaj lom neeg tshwm sim?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev soj ntsuam uas qhia txog kev hloov tshuaj tshwm sim muaj xws li xim hloov , kub hloov , lub teeb muab tawm, tsim ntawm npuas, tsim ntawm precipitate, thiab lwm yam.
Ib yam li ib tug yuav nug, peb qhov kev soj ntsuam yog dab tsi uas yuav qhia tau tias muaj tshuaj lom neeg tshwm sim?
Hauv qab no tuaj yeem qhia tias a tshuaj hloov tau tshwm sim , txawm hais tias qhov pov thawj no tsis yog qhov tseeb: Hloov cov ntxhiab tsw. Hloov cov xim (piv txwv li, nyiaj rau reddish-xim av thaum hlau xeb). Hloov hauv qhov kub lossis lub zog, xws li kev tsim khoom (exothermic) lossis poob (endothermic) ntawm tshav kub.
Qhov thib ob, 5 cov cim qhia txog kev hloov tshuaj lom neeg yog dab tsi? Qee cov cim qhia txog kev hloov tshuaj lom neeg yog kev hloov hauv xim thiab tsim cov npuas. Tsib yam xwm txheej ntawm kev hloov tshuaj lom neeg: xim chage, formation of ib precipitate, formation of a gas , tsw hloov, kub hloov.
Tom qab ntawd, dab tsi qhia txog kev hloov lub cev?
Kev hloov ntawm lub cev yog kev hloov cuam tshuam rau daim ntawv ntawm cov tshuaj, tab sis tsis yog nws cov tshuaj muaj pes tsawg leeg. Piv txwv ntawm lub cev cov khoom muaj xws li melting, hloov mus rau ib qho roj, hloov ntawm lub zog, hloov ntawm durability, kev hloov mus rau crystal daim ntawv, textural hloov , puab, loj, xim, ntim thiab ntom.
Koj ua li cas thiaj paub tias muaj tshuaj lom neeg tshwm sim?
Cov hauv qab no yog cov cim qhia txog kev hloov tshuaj lom neeg:
- Hloov hauv Kub.
- Hloov hauv Xim.
- Cov ntxhiab tsw ntxhiab (tom qab pib qhov tshwm sim)
- Tsim ib tug Precipitate.
- Tsim cov npuas.
Pom zoo:
Dab tsi yog tsib yam pov thawj uas koj tuaj yeem siv los txiav txim seb puas muaj tshuaj lom neeg tshwm sim?
Qee cov cim qhia txog kev hloov tshuaj lom neeg yog kev hloov xim thiab tsim cov npuas. Lub tsib yam kev hloov ntawm tshuaj lom neeg: xim chage, tsim ntawm precipitate, tsim cov roj, tsw hloov, kub hloov
Tam sim ntawd yuav siv dab tsi yog tias koj cov khaub ncaws raug hluav taws lossis yog tias muaj tshuaj lom loj tshwm sim ntawm koj cov khaub ncaws?
Tam sim ntawd yuav siv dab tsi yog tias koj cov khaub ncaws raug hluav taws lossis yog tias muaj tshuaj lom ntau tshwm sim ntawm koj cov khaub ncaws? Koj mus ncaj qha rau da dej kev nyab xeeb thiab sawb ntawm tag nrho koj cov khaub ncaws
Dab tsi yog peb qhov kev soj ntsuam uas yuav qhia tau tias muaj tshuaj lom neeg tshwm sim?
Cov hauv qab no tuaj yeem qhia tau tias kev hloov tshuaj lom neeg tau tshwm sim, txawm hais tias cov pov thawj no tsis muaj tseeb: Hloov cov ntxhiab tsw. Hloov cov xim (piv txwv li, nyiaj rau reddish-xim av thaum hlau xeb). Hloov hauv qhov kub lossis lub zog, xws li kev tsim khoom (exothermic) lossis poob (endothermic) ntawm tshav kub
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
Dab tsi yog tshuaj lom neeg cov tshuaj tiv thaiv thiab cov tshuaj tiv thaiv lub cev?
Qhov sib txawv ntawm cov tshuaj tiv thaiv lub cev thiab cov tshuaj tiv thaiv tshuaj yog muaj pes tsawg leeg. Hauv cov tshuaj tiv thaiv tshuaj, muaj kev hloov pauv ntawm cov tshuaj hauv nqe lus nug; nyob rau hauv ib qho kev hloov ntawm lub cev muaj qhov sib txawv ntawm qhov tsos, tsis hnov tsw, los yog cov duab yooj yim ntawm cov qauv ntawm cov teeb meem yam tsis muaj kev hloov pauv hauv cov ntsiab lus