Video: Hom tshuaj tiv thaiv dab tsi tshwm sim thaum tshav kub absorbed?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov tshuaj tiv thaiv tshuaj tuaj yeem raug cais raws li exothermic lossis endothermic. Cov tshuaj tiv thaiv exothermic tso tawm lub zog rau hauv nws ib puag ncig. Ib endothermic tshuaj tiv thaiv , ntawm qhov tod tes, absorbs zog ntawm nws ib puag ncig nyob rau hauv daim ntawv ntawm tshav kub.
Tsis tas li ntawd, hom tshuaj tiv thaiv dab tsi absorbs lub zog?
endothermic cov tshuaj tiv thaiv
Ib yam li ntawd, yuav ua li cas thaum tshav kub absorbed? Ib qho tshuaj tiv thaiv uas absorbs cua sov yog endothermic. Nws enthalpy yuav zoo, thiab nws yuav txias cia nws ib puag ncig. Cov tshuaj tiv thaiv no yog exothermic (tsis zoo enthalpy, tso tawm ntawm kub ). Thaum cov tshuaj tiv thaiv tshwm sim , qhov chaw ib puag ncig yuav nce hauv qhov kub thiab txias vim qhov nce ntawm kub qhov system tso tawm.
Ua li no, thaum tshav kub absorbed thaum muaj tshuaj lom neeg cov tshuaj tiv thaiv yog hais tias yuav?
A tshuaj tiv thaiv los yog hloov lub cev yog exothermic yog kub yog tso tawm los ntawm qhov system mus rau hauv ib puag ncig. Vim lub puag ncig yog nce kub los ntawm qhov system, qhov kub ntawm qhov chaw ib puag ncig nce. Lub cim ntawm q rau cov txheej txheem exothermic yog qhov tsis zoo vim tias lub cev poob kub . Daim duab 8.7.
Ua li cas koj thiaj paub yog tias cua sov nqus los yog tso tawm?
Enthalpy ntawm cov tshuaj tiv thaiv yog txhais raws li tus kub Lub zog hloov pauv (Δ H ΔH ΔH) uas tshwm sim thaum reactants mus rau cov khoom. Yog cua sov yog absorbed Thaum cov tshuaj tiv thaiv, Δ H ΔH ΔH yog qhov zoo; yog cua sov yog tso tawm , ces Δ H ΔH ΔH yog qhov tsis zoo.
Pom zoo:
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
Thaum tshav kub kub muaj peev xwm vs tshwj xeeb tshav kub yog dab tsi?
Molar Thaum tshav kub kub muaj peev xwm yog ib qho kev ntsuas ntawm cov cua sov uas tsim nyog los nce qhov kub ntawm ib mole ntawm ib tug ntshiab tshuaj los ntawm ib tug degree K. Tshwj xeeb kub muaj peev xwm yog ib qho kev ntsuas ntawm tus nqi ntawm cov cua sov tsim nyog los nce qhov kub ntawm ib gram ntawm ib tug ntshiab. khoom los ntawm ib degree K
Cov tshuaj tiv thaiv dab tsi tshwm sim thaum cawv tsim los ntawm alkene?
Nplooj ntawv no saib ntawm kev tsim cov cawv los ntawm kev tso dej ncaj qha ntawm alkenes - ntxiv dej ncaj qha rau carbon-carbon ob daim ntawv cog lus. Ethanol yog tsim los ntawm reacting ethene nrog chav. Cov tshuaj tiv thaiv yog thim rov qab. Tsuas yog 5% ntawm ethene hloov mus rau hauv ethanol ntawm txhua qhov dhau los ntawm lub reactor
Cov tshuaj tiv thaiv dab tsi yog qhov tshuaj tiv thaiv neutralization?
Neutralization yog ib hom tshuaj tiv thaiv nyob rau hauv uas muaj zog acid thiab muaj zog puag react nrog ib leeg los tsim dej thiab ntsev
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