Cov txheej txheem:
Video: Vim li cas cov cua sov yog kev hloov tshuaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib qho exothermic tshuaj tiv thaiv yog a tshuaj tiv thaiv uas tso tawm kub . Nws muab net zog rau nws ib puag ncig. Ntawd yog, lub zog xav tau los pib lub tshuaj tiv thaiv yog tsawg tshaj li lub zog tso tawm. Thaum nruab nrab uas lub tshuaj tiv thaiv yog qhov chaw sau kub , cov tshuaj tiv thaiv yog exothermic.
Raws li kev sib raug zoo, yog cua sov hloov tshuaj?
Yog hais tias kub nce, raws li nws ua nyob rau hauv feem ntau cov tshuaj tiv thaiv , a tshuaj hloov zoo li yuav tshwm sim. Qhov no txawv ntawm lub cev kub hloov . Thaum lub cev kub hloov , ib yam khoom, xws li dej yog rhuab. Qhov no tshuaj tiv thaiv tsim kub raws li ib yam khoom thiab yog (heev) exothermic.
Ib tug kuj yuav nug, puas yog cua sov hlau hloov tshuaj? Lub cev thiab Kev hloov tshuaj . Lub cev hloov yog a hloov hauv qhov khoom kev hloov daim ntawv tab sis khaws nws tib yam tshuaj muaj pes tsawg leeg (reversible). *Yog koj kub ib hlau bar kom txog thaum nws glows liab kub, nws tseem chemically tib yam hlau . Cov hlau tsis tau hloov ua lwm yam.
Hais txog qhov no, vim li cas thiaj muaj kev hloov pauv hauv tshuaj lom neeg?
Lub zog hloov hauv a tshuaj tiv thaiv yog vim qhov sib txawv ntawm cov nyiaj khaws cia tshuaj lub zog ntawm cov khoom thiab cov reactants. Qhov no khaws cia tshuaj zog, or kub cov ntsiab lus, ntawm qhov system yog hu ua nws enthalpy.
10 chemical pauv piv txwv yog dab tsi?
Kaum piv txwv ntawm kev hloov tshuaj lom neeg yog:
- Hlawv cov thee, ntoo, ntawv, kerosene, thiab lwm yam.
- Tsim cov curd los ntawm mis nyuj.
- Electrolysis ntawm dej los tsim hydrogen thiab oxygen.
- Rusting ntawm hlau.
- Kev tawg ntawm cracker.
- Ua noj ua haus.
- Kev zom zaub mov.
- Germination ntawm noob.
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
Cov kev hloov ntawm lub cev txawv ntawm cov tshuaj hloov pauv li cas muab ib qho piv txwv ntawm txhua tus?
Kev hloov tshuaj lom neeg tshwm sim los ntawm cov tshuaj tiv thaiv tshuaj, thaum lub cev hloov pauv yog thaum cov teeb meem hloov pauv tab sis tsis yog tshuaj lom neeg. Piv txwv ntawm kev hloov tshuaj lom neeg yog hlawv, ua noj, xeb, thiab rotting. Piv txwv ntawm kev hloov lub cev yog boiling, melting, khov, thiab shredding
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Yog vim li cas sodium poov tshuaj twj tso kua mis suav hais tias yog ib qho kev thauj mus los uas cov kev taw qhia yog cov sodium thiab poov tshuaj tau pumped?
Sodium-Potassium Pump. Kev thauj mus los yog lub zog xav tau cov txheej txheem ntawm kev siv cov molecules thiab ions hla daim nyias nyias 'nce toj' - tiv thaiv kev sib tw gradient. Txhawm rau txav cov molecules tawm tsam lawv cov concentration gradient, yuav tsum muaj cov khoom siv protein
Qhov kev sib npaug twg yog qhov tsim nyog los suav cov cua sov uas tsim los ntawm HCl NaOH cov tshuaj tiv thaiv?
Xam cov naj npawb ntawm moles ntawm lub hauv paus koj ntxiv los txiav txim siab molar tshav kub ntawm qhov nruab nrab, qhia siv qhov sib npaug Δ H = Q ÷ n, qhov twg 'n' yog tus naj npawb ntawm moles. Piv txwv li, xav tias koj ntxiv 25 mL ntawm 1.0 M NaOH rau koj HCl los ua kom muaj cua sov ntawm nruab nrab ntawm 447.78 Joules