Video: Puas yog ntxiv ntsev rau dej endothermic lossis exothermic?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nws tsuas yog siv zog me ntsis ntxiv kom cais cov ions ntawm ib leeg dua li tso tawm los ntawm cov dej molecules nyob ib puag ncig cov ions. Qhov no txhais tau tias tsuas yog me ntsis ntxiv zog yuav tsum tau muab tso rau hauv qhov kev daws teeb meem dua li tso tawm rov qab rau hauv cov tshuaj; yog li ntawd dissolving rooj ntsev hauv dej yog endothermic.
Ib yam li ntawd, puas yog ntxiv dej rau cov ntsev uas tsis muaj ntsev exothermic?
Cov tshuaj tiv thaiv ntawm tsis muaj dej tooj liab sulphate thiab dej yog thim rov qab. Cov tshuaj tiv thaiv rov qab yog exothermic - Lub zog raug xa mus rau ib puag ncig thaum nws tshwm sim. Qhov no yooj yim pom. Thaum twg dej ntxiv rau tsis muaj dej tooj liab sulphate, txaus tshav kub yog tso tawm kom lub dej npuas thiab boil.
Ib yam li ntawd, yuav ua li cas rau dej thaum ntsev ntxiv? Thaum twg ntsev yog tov nrog dej , cov ntsev dissolves vim covalent bonds ntawm dej muaj zog tshaj cov ionic bonds nyob rau hauv lub ntsev molecules. Dej molecules rub cov sodium thiab chloride ions sib nrug, rhuav tshem cov ionic daim ntawv cog lus uas tuav lawv ua ke.
Yog li ntawd, yog sodium nitrate endothermic los yog exothermic?
Piv txwv li, ib qho kev daws ntawm poov tshuaj nitrate thiab dej ntau dua endothermic tshaj sodium nitrate hauv dej.
Vim li cas NaOH thiab dej exothermic?
NaOH + H2O = Na+ and OH- ions. Cov tshuaj tiv thaiv yuav yog Exothermic , qhov twg cua sov yuav tso tawm. Lub tshav kub hloov zuj zus los ntawm kev sib xyaw ua ke sodium hydroxide nrog dej yog vim lub -OH ions zoo kawg nkaus stability. Thaum tshav kub kub yog emissions raws li ib tug tshwm sim ntawm cov tshuaj hom raug coj mus rau ib tug qis zog lub xeev.
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