Cov txheej txheem:

Dab tsi ua rau cov txheej txheem dissolving exothermic lossis endothermic?
Dab tsi ua rau cov txheej txheem dissolving exothermic lossis endothermic?

Video: Dab tsi ua rau cov txheej txheem dissolving exothermic lossis endothermic?

Video: Dab tsi ua rau cov txheej txheem dissolving exothermic lossis endothermic?
Video: Tsis xav ua neeg 7/8/2018 2024, Kaum ib hlis
Anonim

Cov txheej txheem ntawm yaj tuaj yeem yog endothermic (kub poob) los yog exothermic (kub nce mus). Yog tias nws siv lub zog ntau dua los cais cov khoom ntawm cov kuab tshuaj dua li tso tawm thaum cov dej molecules sib txuas rau cov khoom, ces qhov kub thiab txias ( endothermic ).

Ua li no, yog vim li cas dissolving gas exothermic?

Thaum a gas yaj Nws ua li ntawd vim nws cov molecules cuam tshuam nrog cov kuab tshuaj molecules. Vim tias cov cua sov tso tawm thaum cov kev sib cuam tshuam zoo nkauj tshiab no, yaj feem ntau cov pa hauv kua yog ib exothermic txheej txheem (ΔHsoln<0).

Ib yam li ntawd, yog dissolving nacl nyob rau hauv dej endothermic los yog exothermic? Teb thiab piav qhia: Dissolving ntsev hauv dej yog endothermic . Qhov no txhais tau tias thaum twg ntsev yog yaj nyob rau hauv dej qhov kub ntawm cov tshuaj feem ntau yog qis dua me ntsis

Ua li no, 3 kauj ruam hauv kev ua kom tiav yog dab tsi?

Lub zog ntawm Dissolution

  • Kauj Ruam 1: Sib cais cov ntsiab lus ntawm cov kua los ntawm ib leeg [ENDOTHERMIC]
  • Kauj Ruam 2: Sib cais cov khoom hnyav ntawm ib leeg [ENDOTHERMIC]
  • Kauj Ruam 3: Muab cov kuab tshuaj sib cais thiab cov kuab tshuaj los ua cov tshuaj [EXOTHERMIC]

Puas yog calcium chloride thiab dej endothermic lossis exothermic?

Calcium chloride yog ib tug chemical compound ua los ntawm calcium ions thiab chlorine ions. Cov ions yog tuav ua ke los ntawm ib qho ionic, los yog tsis muaj zog ntsev daim ntawv cog lus. Kev sib tov calcium chloride nrog dej yog ib exothermic cov tshuaj tiv thaiv, uas txhais tau hais tias kev sib xyaw ntawm ob yam khoom tso tawm cua sov.

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