Video: Qhov kub ntawm ib daim hlau zaum hauv dej npau npau yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ceeb toom qhov pib kub ntawm cov hlau (52.0 ° C). Qhov no yog ib qho txawv txav ntawm cov qauv hlau feem ntau yog rhuab los ntawm immersion nyob rau hauv boiling dej, ua rau ib txwm pib kub ntawm los yog ze. 100.0 ° C rau hlau.
Ib sab ntawm qhov no, yuav ua li cas thaum koj muab cov hlau kub tso rau hauv dej?
Yuav ua li cas thaum ib feem ntawm kub hlau poob rau hauv chav tsev kub dej . Lub sijhawm dhau los hlau yuav txias thiab dej yuav kub nce. Thaum kawg ob yam khoom yuav muaj qhov kub thiab txias. Lawv ces hais tias nyob rau hauv thermal equilibrium nrog ib leeg.
Tom qab ntawd, lo lus nug yog, yuav ua li cas tshwm sim thaum koj txias kub kub sai? Yog koj ceev heev txias ib hlau yaj, nws tsim ib lub iav hlau. Huag, tej zaum cov organic ib feem ntawm cov alloy yog super muaj zog thiab tiv thaiv nws los ntawm melting los ntawm tuav lub hlau hauv, txawm tias hlau yog ua tau nyob rau hauv cov kua.
Raws li txoj cai, Q MC _firxam_#8710 yog dab tsi; T siv rau?
Q = mc∆T . Q = tshav kub zog (Joules, J) m = loj ntawm ib yam khoom (kg) c = tshwj xeeb kub (units J / kg∙K) ∆ yog lub cim txhais tias "kev hloov hauv"
Yuav ua li cas yog ib qho thaiv ntawm cov hlau kub muab tso rau hauv ib khob dej txias?
Lub ntsuas kub ua kua nthuav dav thaum nws yog kub thiab ua me me thaum nws yog txias . Yog ib block yog ntawm hlau kub yog muab tso rau hauv ib khob dej txias , qhov kub ntawm lub hlau yuav txo, thiab qhov kub ntawm qhov dej yuav nce.
Pom zoo:
Puas yog dej ntsev npau npau hloov lub cev?
Nws yog kev hloov ntawm lub cev. Hauv kev daws cov sodium thiab chlorine muaj nyob hauv lawv cov ntawv ion, tab sis yog tias koj rhaub dej ntsev yog dab tsi tseem tshuav. Nws tseem yog ntsev thiab tsis tau hloov pauv los ntawm cov txheej txheem hydration thiab lub cev qhuav dej
Thawj qhov kub ntawm cov dej kub yog dab tsi?
Teb: Thaum pib kub dej kub 69 ° C,
Puas yog dej npau npau yog lub cev lossis tshuaj lom neeg?
Dej Boiling: Cov dej kub npau npau yog ib qho piv txwv ntawm kev hloov ntawm lub cev thiab tsis yog kev hloov tshuaj lom neeg vim tias cov dej vapor tseem muaj cov qauv molecular zoo li cov kua dej (H2O). Yog hais tias cov npuas tau tshwm sim los ntawm decomposition ntawm ib tug molecule rau hauv cov pa roj (xws li H2O → H2 thiab O2), ces boiling yuav ib tug tshuaj hloov
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom
Puas yog cov dej npau npau yog tshuaj lom neeg lossis lub cev hloov?
Boiling waterBoiling water yog ib qho piv txwv ntawm kev hloov ntawm lub cev thiab tsis yog kev hloov tshuaj lom neeg vim tias cov dej vapor tseem muaj cov qauv molecular zoo li cov kua dej (H2O). Yog hais tias cov npuas tau tshwm sim los ntawm decomposition ntawm ib tug molecule rau hauv cov pa roj (xws li H2O → H2 thiab O2), ces boiling yuav ib tug tshuaj hloov