Video: Vim li cas cov tshuaj tiv thaiv tso tawm lub zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txhua yam tshuaj cov tshuaj tiv thaiv koom nrog zog . Zog yog siv los rhuav cov ntawv cog lus hauv reactants, thiab zog yog tso tawm thaum daim ntawv cog lus tshiab tsim hauv cov khoom. Zoo li combustion tshuaj tiv thaiv nyob rau hauv lub cub tawg, ib co tshuaj cov tshuaj tiv thaiv xav tau tsawg zog txhawm rau rhuav cov ntawv cog lus hauv reactants tshaj li qhov yog tso tawm thaum daim ntawv cog lus tsim hauv cov khoom.
Ntawm no, vim li cas cov tshuaj tiv thaiv exothermic tso tawm lub zog?
Exothermic tshuaj tiv thaiv hloov tshuaj zog (enthalpy) nyob rau hauv cov tshuaj lom neeg mus rau hauv tshav kub zog . Cov tshuaj zog txo qis, thiab cua sov zog nce (tag nrho zog yog khaws cia). BOND MAKING Tso ENERGY , TABSIS YUAV TSUM PAUB TIAS, yog li ntawd, vim yog kev sib cog lus ua, cua sov lub zog raug tso tawm.
Ib sab saum toj no, cov tshuaj tiv thaiv dab tsi tso tawm lub zog tshaj plaws? exothermic tshuaj tiv thaiv
Qhov thib ob, cov tshuaj endothermic puas tso tawm lub zog?
Cov tshuaj tiv thaiv kab mob endothermic nqus zog . Yog li ntawd, ntau dua zog yog xav tau los rhuav cov bonds nyob rau hauv cov reactants tshaj li yog tso tawm thaum lub sij hawm tsim ntawm cov khoom. Qhov txawv hauv zog feem ntau yog absorbed los ntawm ib puag ncig raws li cua sov. Qhov no feem ntau ua rau txo qis ntawm qhov kub thiab txias tshuaj tiv thaiv sib tov.
Koj qhia li cas yog tias cov tshuaj tiv thaiv absorbs lossis tso tawm lub zog?
Enthalpy ntawm a tshuaj tiv thaiv yog txhais raws li tus cua sov zog hloov (Δ H ΔH ΔH) uas tshwm sim thaum reactants mus rau cov khoom. Yog cua sov yog nqus tau thaum lub sij hawm 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:
Puas yog lub zog tso tawm lossis absorbed hauv cov tshuaj tiv thaiv exothermic?
Ib qho tshuaj tiv thaiv uas lub zog tawm mus rau ib puag ncig yog hu ua cov tshuaj tiv thaiv exothermic. Nyob rau hauv hom tshuaj tiv thaiv no lub enthalpy, los yog khaws cia chemical zog, yog qis dua rau cov khoom tshaj cov reactants. Thaum ammonium nitrate yaj nyob rau hauv dej, lub zog yog absorbed thiab dej txias
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
Qhov nqus thiab tso tawm ntawm lub zog cuam tshuam li cas rau qhov kub thiab txias thaum lub sij hawm muaj tshuaj tiv thaiv?
Nyob rau hauv endothermic cov tshuaj tiv thaiv cov enthalpy ntawm cov khoom yog ntau dua cov enthalpy ntawm cov reactants. Vim tias cov tshuaj tiv thaiv tso tawm lossis nqus lub zog, lawv cuam tshuam rau qhov kub ntawm lawv ib puag ncig. Exothermic cov tshuaj tiv thaiv cua sov ua rau lawv ib puag ncig thaum cov tshuaj tiv thaiv endothermic txias rau lawv
Lub zog tso tawm hauv cov tshuaj tiv thaiv nuclear los ntawm qhov twg?
Nuclear zog los ntawm me me hloov pauv hauv nuclei raws li cov txheej txheem xov tooj cua tshwm sim. Hauv fission, loj nuclei tawg sib nrug thiab tso tawm lub zog; hauv fusion, me me nuclei sib koom ua ke thiab tso tawm lub zog
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