Video: Puas yog cua sov tso tawm thaum daim ntawv cog lus tsim?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv txhua hom tshuaj tiv thaiv, daim ntawv cog lus yog tawg thiab reassembled rau daim ntawv cov khoom tshiab. Txawm li cas los xij, hauv exothermic, endothermic, thiab tag nrho cov tshuaj tiv thaiv, nws siv lub zog los rhuav tshem cov tshuaj uas twb muaj lawm. daim ntawv cog lus thiab lub zog yog tso tawm thaum nov daim ntawv cog lus.
Ntawm no, yog cua sov tso tawm thaum hydrogen bonds raug tsim?
- hydrogen bonds , zoo li tag nrho daim ntawv cog lus , yuav tsum nqus kub kom tawg, thiab kub yog tso tawm thaum lawv daim ntawv ; - zoo heev ntawm kub lub zog (nce hauv qhov kub thiab txias) yog xav tau txhawm rau cuam tshuam rau hydrogen bonds kom cov dej molecules tuaj yeem txav tau sai.
Ib tug kuj yuav nug, yuav ua li cas tshwm sim thaum muaj tshuaj lom neeg daim ntawv cog lus? Tshuaj cov tshuaj tiv thaiv ua thiab rhuav tshem chemical bonds nruab nrab ntawm molecules, ua rau cov ntaub ntawv tshiab raws li cov khoom ntawm cov tshuaj tiv thaiv . tawg chemical bonds absorbs zog, thaum ua tshiab daim ntawv cog lus tso tawm lub zog, nrog rau tag nrho tshuaj tiv thaiv ua endothermic los yog exothermic.
Ua qhov no hauv kev txiav txim siab, thaum cov nyiaj tau los tsim lub zog?
Bond -breaking yog ib qho txheej txheem endothermic. Zog yog tso tawm thaum tshiab daim ntawv cog lus . Bond -ua yog txheej txheem exothermic. Seb cov tshuaj tiv thaiv endothermic los yog exothermic nyob ntawm qhov sib txawv ntawm qhov zog xav tau kev tawg daim ntawv cog lus thiab cov zog tso tawm thaum tshiab daim ntawv cog lus.
Thaum daim ntawv cog lus tshiab tsim nyob rau hauv cov tshuaj tiv thaiv dab tsi tshwm sim?
Thaum tshuaj tiv thaiv , cov daim ntawv cog lus uas tuav cov molecules ua ke sib cais thiab tsim daim ntawv cog lus tshiab , reranging atoms rau hauv cov khoom sib txawv. Txhua daim ntawv cog lus yuav tsum muaj qhov sib txawv ntawm lub zog kom tawg lossis daim ntawv ; tsis muaj lub zog no, lub tshuaj tiv thaiv tsis tuaj yeem tshwm sim, thiab cov reactants tseem nyob zoo li lawv.
Pom zoo:
Yuav ua li cas yog daim ntawv cog lus sib txawv ntawm daim ntawv cog lus ionic?
Qhov sib txawv ntawm cov ionic thiab covalent daim ntawv cog lus yog tias covalent daim ntawv cog lus yog tsim thaum ob lub atoms sib koom electrons. Ionic bonds yog lub zog uas tuav ua ke electrostatic zog ntawm kev nyiam ntawm cov ions oppositely them. Ionic bonds muaj qhov sib txawv electronegativity ntau dua lossis sib npaug li 2
Dab tsi yog qhov txawv ntawm daim ntawv cog lus lub zog thiab daim ntawv cog lus dissociation zog?
Qhov sib txawv tseem ceeb ntawm kev sib txuas ntawm lub zog thiab lub zog bonddissociation yog tias lub zog sib txuas yog qhov nruab nrab ntawm lub zog xav tau los rhuav tshem tag nrho cov kev sib txuas ntawm tib ob hom atoms nyob rau hauv ib qho chaw sib txuas whereas daim ntawv cog lus dissociation zog yog tus nqi ntawm cov hluav taws xob xav tau los rhuav tshem ib qho kev sib koom ua ke inhomolysis
Dab tsi yog daim ntawv cog lus ionic thiab nws tsim li cas?
Ionic daim ntawv cog lus, tseem hu ua electrovalent bond, hom kev sib txuas tsim los ntawm electrostatic attraction ntawm oppositely them ions nyob rau hauv ib tug tshuaj compound. Xws li daim ntawv cog lus thaum lub valence (sab nrauv) electrons ntawm ib lub atom raug xa mus tas li mus rau lwm lub atom
Puas yog daim ntawv cog lus hydrogen zoo ib yam li daim ntawv cog lus?
Hydrogen daim ntawv cog lus yog lub npe muab rau electrostatic kev sib cuam tshuam ntawm tus nqi zoo ntawm hydrogen atom thiab tus nqi tsis zoo ntawm oxygen atom ntawm ib qho chaw nyob sib ze. Covalent daim ntawv cog lus yog qhov sib cuam tshuam electrostatic ntawm ob lub atom hauv tib lub molecule
Puas tsim cov ntawv cog lus tso tawm lub zog?
Hauv txhua hom tshuaj tiv thaiv, daim ntawv cog lus tau tawg thiab rov ua dua los tsim cov khoom tshiab. Txawm li cas los xij, nyob rau hauv exothermic, endothermic, thiab tag nrho cov tshuaj tiv thaiv, nws yuav siv lub zog los rhuav tshem cov tshuaj uas twb muaj lawm thiab lub zog raug tso tawm thaum daim ntawv cog lus tshiab