2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib yam khoom ntshiab muaj ib lub ntsiab lus melting ntse (kub ntawm ib qhov kub) thiab lub qhov kub hnyiab (boils ntawm ib qhov kub). Ib qho kev sib tov melts dhau ntawm qhov kub thiab txias dhau ntawm qhov kub thiab txias. Homogeneous sib tov yog hu ua kev daws teeb meem. … Heterogeneous tshuaj yeej ib txwm sib tov.
Yuav ua li cas rau cov khoom ntshiab thaum nws yaj?
Cov khoom melts thiab tig mus ua kua. Cov khoom ntawm ib yam khoom thaum nws yog khoom, kua los yog roj tseem zoo li qub. Lawv atomic lossis molecular configuration tsis hloov. Tsuas yog tus nqi ntawm lub zog hauv txhua qhov ntawm cov khoom nce ntxiv thaum nws yaj.
Yuav ua li cas yog cov yaj ntawm cov tshuaj ntshiab?
Kev piav qhia: Cov tshuaj ntshiab muaj ib qho kub uas lawv dhau los ua kua(lawv yaj). Qhov point no hu ua lub melting point. Nyob rau ntawm qhov kub no, lub zog ntawm cov molecules tau mus txog qhov kub thiab txias ntawm qhov sib txuas ntawm cov molecules tsis muaj zog.
Dab tsi yog cov khoom ntshiab ntawm lub melting point?
Ntshiab, crystalline solids muaj tus yam ntxwv melting point, kub uas cov khoom melts los ua kua . Kev hloov pauv ntawm cov khoom thiab cov kua yog ntse heev rau cov qauv me me ntawm cov khoom ntshiab uas cov ntsiab lus melting tuaj yeem ntsuas rau 0.1 o C.
Yuav ua li cas thaum melting?
Melting yog txheej txheem uas ua rau cov khoom hloov pauv ntawm cov khoom mus rau ib qhoua kua. Melting tshwm sim thaum cov molecules ntawm ib qho khoom nrawm nrawm txaus kom cov lus tsa suab kov yeej cov kev nyiam kom cov molecules txav tau dhau los ua kua.
Pom zoo:
Puas yog magnalium yog cov khoom ntshiab?
Lo lus nug: Alloys yog cov sib tov ntawm ob lossis ntau dua hlau. Magnalium yog an alloy ntawm magnesium thiab txhuas. Nws feem ntau yog siv rau qhov chaw dav hlau. Puas yog magnalium yog qhov sib xyaw? Magnalium yog an aluminium alloy nrog 5% magnesium thiab 95% aluminium.
Lub sijhawm kuv lub sijhawm dawb lossis thaum kuv lub sijhawm dawb?
yog li, qhov no txhais tau tias "thaum kuv lub sijhawm dawb" tsis siv ntauthiab koj muab "hauv kuv lub sijhawm dawb" ntau dua nyob rau qhov kawg ntawm kab lus. Piv txwv li: Kuv tau taug kev tus dev thaum kuv lub sijhawm dawb.
Lub sijhawm nyob qhov twg ntawm lub sijhawm teem sijhawm?
kab kab rov tav ntawm lub rooj ntu ntu yog hu ua ntu ntu. Lub sijhawm nyob rau ntawm lub sijhawm nyob qhov twg? Ib lub sijhawm yog kab kab rov tav ntawm lub rooj ntu ntu. Muaj xya lub sij hawm nyob rau hauv lub sij hawm ntawm lub sij hawm, nrog txhua tus pib ntawm sab laug.
Puas muaj lub sijhawm siv sijhawm lossis cov saw hlau sijhawm?
Lub sij hawm saws ua haujlwm tib yam li a sij hawm sivua. … Lub sij hawm saws nyob rau hauv lub cav thiab tau txais lubrication los ntawm lub cav roj thiab yuav kav ntev, thaum lub sij hawm siv txoj siv sia nyob sab nraum lub cav thiab nyiam qhuav tawm thiab tawg.
Puas yog homogeneous sib tov yog cov khoom ntshiab?
Cov tshuaj ntshiab yog ib hom teeb meem uas muaj cov tshuaj lom neeg ruaj khov thiab cov yam ntxwv sib txawv thaum sib xyaw ua ke yog sib tov ntawm ob lossis ntau qhov sib xyaw nrog cov khoom sib xyawuas sib xws los yog sib xyaw ua ke kom sib cais sib cais.
