Video: Yuav ua li cas yog endothermic thiab exothermic cov tshuaj tiv thaiv nyob rau hauv daim duab lub zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv qhov xwm txheej endothermic tshuaj tiv thaiv , cov reactants yog qis dua zog qib piv rau cov khoom-raws li qhia hauv daim duab zog hauv qab no. Hauv qhov xwm txheej exothermic tshuaj tiv thaiv , cov reactants yog siab dua zog qib piv rau cov khoom, xws li qhia hauv qab no daim duab zog.
Tsis tas li ntawd, daim duab qhia lub zog qhia tau hais tias qhov kev tshwm sim no yog exothermic li cas?
Vertical axis ntawm no daim duab sawv cev rau qib zog thiab kab rov tav axis sawv cev rau kev nce qib ntawm cov tshuaj tiv thaiv los ntawm reactants rau cov khoom. Daim duab qhia lub zog rau exothermic tshuaj tiv thaiv Hauv ib exothermic tshuaj tiv thaiv , reactants muaj ntau dua zog tshaj cov khoom.
Ib tug kuj yuav nug, ua li cas koj sau cov tshuaj tiv thaiv exothermic? Qhia nyob rau hauv ib tug tshuaj sib npaug: reactants → khoom + zog. Exothermic Reaction txhais tau tias "exo" (los ntawm lo lus Greek: "έξω", txhais ua "tawm") lub ntsiab lus tso tawm thiab "thermic" txhais tau tias cua sov. Yog li cov tshuaj tiv thaiv nyob rau hauv uas muaj kev tso tawm ntawm tshav kub nrog los yog tsis muaj teeb yog hu ua exothermic tshuaj tiv thaiv.
Yog li ntawd, endothermic thiab exothermic cov tshuaj tiv thaiv zoo li cas?
Qhov txawv ntawm endothermic thiab exothermic cov tshuaj tiv thaiv dag nyob rau hauv cov lus lawv tus kheej. "Thermic" yog hais txog cua sov, ib yam li hauv lo lus "thermometer." "Exo" txhais tau tias "sab nraum" thiab "endo" txhais tau tias "sab hauv." Yog li ntawd, ib endothermic tshuaj tiv thaiv rub cov cua sov rau hauv ib qho khoom lossis thaj chaw, thaum ib qho exothermic tshuaj tiv thaiv tshem tawm cua sov.
Puas yog Boiling Dej endothermic lossis exothermic?
Peb txhua tus tuaj yeem txaus siab rau qhov ntawd dej tsis spontaneously boil ntawm chav tsev kub; xwb peb yuav tsum tau cua sov nws. Vim peb yuav tsum ntxiv cua sov, boiling dej yog ib txoj kev uas chemists hu endothermic . Kom meej meej, yog tias qee cov txheej txheem xav tau cua sov, lwm tus yuav tsum muab cov cua sov thaum lawv ua. Cov no yog hu ua exothermic.
Pom zoo:
Yuav ua li cas rau lub zog nyob rau hauv ib tug exothermic tshuaj tiv thaiv?
Cov tshuaj tiv thaiv exothermic tshwm sim thaum lub zog siv los rhuav tshem cov ntawv cog lus hauv cov reactants (cov khoom pib) tsawg dua lub zog tso tawm thaum cov nyiaj tshiab tau tsim nyob rau hauv cov khoom (cov khoom koj xaus nrog). Combustion yog ib qho piv txwv ntawm cov tshuaj tiv thaiv exothermic - koj tuaj yeem hnov cov cua sov uas tau muab tawm yog tias koj nyob ze dhau
Vim li cas cov tshuaj tiv thaiv kev zom zaub mov hu ua hydrolysis cov tshuaj tiv thaiv?
Thaum lub sij hawm zom mov, piv txwv li, decompositionreactions zom cov zaub mov loj rau hauv cov me me los ntawm kev ntxiv cov dej molecules. Hom tshuaj no hu ua hydrolysis. Raws li dej absorbs heatenergy, qee lub zog yog siv los rhuav tshem hydrogenbonds
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
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