Tus txheej txheem ntawm kev sib cais yog exothermic thaum ntau lub zog tawm thaum cov dej molecules "daim ntawv cog lus" rau cov kuab tshuaj dua yog siv los rub cov kua dej sib nrug. Vim tias muaj zog ntau dua li siv, cov molecules ntawm cov tshuaj txav nrawm dua, ua rau qhov kub thiab txias.
YPuas yog yaj hauv dej endothermic lossis exothermic?
2. Cov txheej txheem twg yog endothermic thiab qhov twg yog exothermic? Soluble hauv dej yog txheej txheem exothermic.
Puas yog qhov tawg NaCl endothermic lossis exothermic?
Dissolution of NaCl hauv dej Dissolution of sodium chloride hauv dej yog endothermic.
Puas yog dej khov melting endothermic lossis exothermic?
Lub zog no rhuav tshem cov kev sib khi nruj hauv cov dej khov, thiab ua rau cov dej molecules txav nrawm dua thiab sib tsoo ntau zaus. Yog li ntawd, qhov kub ntawm cov dej khov nce thiab nws hloov mus rau hauv dej! Yeej, cov dej khov yaj yog cov tshuaj tiv thaiv endothermic vim tias cov dej khov absorbs (kub) lub zog, uas ua rau muaj kev hloov pauv.
Puas ua qe endothermic lossis exothermic?
The endothermic reaction piav qhia yog ua noj qe. Nyob rau hauv tus txheej txheem, lub tshav kub ntawm lub lauj kaub yog absorbed los ntawm lub qe, uas yog txheej txheem ntawm nws ua noj, yog li ntawd qhov kawg tshwm sim yog ib tug siav qe.
