Video: 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?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv endothermic cov tshuaj tiv thaiv lub enthalpy ntawm cov khoom yog ntau tshaj qhov enthalpy ntawm cov reactants. Vim cov tshuaj tiv thaiv tso tawm los yog nqus zog , lawv cuam tshuam tus kub ntawm lawv ib puag ncig. Exothermic cov tshuaj tiv thaiv Ua kom sov lawv ib puag ncig thaum endothermic cov tshuaj tiv thaiv txias lawv.
Ib yam li ntawd, koj tuaj yeem nug, lub zog tawm los yog nqus tau li cas thaum muaj tshuaj lom neeg?
Zog thiab Tshuaj Reactions Zog yog siv los rhuav cov ntawv cog lus hauv reactants, thiab lub zog raug tso tawm thaum daim ntawv cog lus tshiab tsim hauv cov khoom. Hauv lwm yam tshuaj tiv thaiv , nws yuav siv sij hawm ntau 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. Cov no cov tshuaj tiv thaiv , hu ua endothermic cov tshuaj tiv thaiv , nqus zog.
Ib yam li ntawd, lub zog hloov pauv dab tsi tshwm sim hauv cov tshuaj tiv thaiv? Tshuaj tiv thaiv feem ntau koom nrog kev hloov hauv zog vim yog kev tawg thiab tsim ntawm daim ntawv cog lus. Cov tshuaj tiv thaiv hauv qe zog tso tawm yog exothermic cov tshuaj tiv thaiv , thaum cov uas coj hauv tshav kub zog yog endothermic.
Ua raws li qhov xav tau, qhov kub thiab txias hloov li cas thaum muaj tshuaj tiv thaiv?
Yog hais tias ob yam tshuaj reacts thiab cov kub ntawm qhov sib tov txo, lub tshuaj tiv thaiv yog endothermic. Yog hais tias ob yam tshuaj reacts thiab cov kub ntawm qhov sib tov nce, lub tshuaj tiv thaiv yog exothermic. A tshuaj tiv thaiv koom nrog kev rhuav tshem cov ntawv cog lus hauv cov reactants thiab tsim cov ntawv cog lus hauv cov khoom.
Lub zog hloov pauv ntawm ib daim ntawv mus rau lwm qhov hauv cov tshuaj tiv thaiv exothermic li cas?
Ib exothermic tshuaj tiv thaiv yog ib qho uas tso tawm zog hauv daim ntawv ntawm tshav kub los yog lub teeb. Hauv lwm yam cov tshuaj tiv thaiv , cov zog uas yuav tsum tau absorbed los rhuav cov bonds hauv cov reactants, yog ntau tshaj qhov zog uas yog tso tawm thaum cov ntawv cog lus tshiab hauv cov khoom raug tsim.
Pom zoo:
Yuav ua li cas rau pH thaum lub sij hawm Neutralization cov tshuaj tiv thaiv?
Neutralization. Neutralization yog cov tshuaj tiv thaiv ntawm cov kua qaub nrog lub hauv paus uas ua rau lub pH txav mus rau 7. Nws yog ib qho tseem ceeb txheej txheem uas tshwm sim nyob rau hauv lub neej txhua hnub xws li nyob rau hauv kev kho mob ntawm acid indigestion thiab kho cov acidic av los ntawm kev ntxiv txiv qaub. Neutralization kuj txav pH ntawm alkali nqes mus rau xya
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Thaum tshav kub kub ntawm cov tshuaj tiv thaiv, tus nqi ntawm cov cua sov uas yuav tsum tau ntxiv los yog tshem tawm thaum lub sij hawm cov tshuaj tiv thaiv nyob rau hauv thiaj li yuav khaws tag nrho cov khoom nyob rau hauv tib lub kub. Yog tias qhov kub ntawm cov tshuaj tiv thaiv yog qhov zoo, cov tshuaj tiv thaiv tau hais tias yog endothermic; yog hais tias tsis zoo, exothermic