Cov tshuaj twg yog siv rau hauv cov khoom kub thiab txias?
Cov tshuaj twg yog siv rau hauv cov khoom kub thiab txias?

Video: Cov tshuaj twg yog siv rau hauv cov khoom kub thiab txias?

Video: Cov tshuaj twg yog siv rau hauv cov khoom kub thiab txias?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
Anonim

Instant Kub thiab Cold Packs

Raws li cov ntsev disassociates, tshav kub yog tso tawm nyob rau hauv ib tug exothermic cov tshuaj tiv thaiv los yog absorbed nyob rau hauv ib tug endothermic cov tshuaj tiv thaiv. Kev lag luam instant txias pob khoom feem ntau siv ob qho tib si ammonium nitrate los yog urea raws li lawv ntsev tivthaiv; cov pob khoom kub feem ntau siv magnesium sulfate los yog calcium chloride.

Hauv qhov no, cov tshuaj dab tsi siv rau hauv cov pob kub kub?

Ib qho yooj yim tshuaj kub pob khoom muaj peev xwm cuam tshuam cov calcium chloride, tseem hu ua pob zeb ntsev, rau hauv dej. Raws li cov muaju ntawm pob zeb ntsev yaj, lawv tsim kub los ntawm cov txheej txheem ntawm calcium chloride dissolving rau hauv nws cov ionic collective.

Tom qab, lo lus nug yog, dab tsi yog cov khoom kub thiab txias siv rau? Kub tuaj yeem ua kom ntshav txaus thiab pab rov qab txav mus rau cov ntaub so ntswg raug mob. Kev sov tuaj yeem txo cov leeg pob txha, mob, thiab cov leeg nqaij. Raws li nrog cov hnab txias , cov khoom kub muaj lub luag haujlwm los txo qhov mob los ntawm kev raug mob hnyav thiab mob ntev, xws li pob txha, kab mob, cov leeg nqaij spasms, whiplash, thiab mob caj dab.

Kuj Paub, ua li cas cov pob khoom kub ua haujlwm?

Kub pob / Txias Pob . Tshuaj tuaj yeem khaws lub zog thiab tso tawm hauv daim ntawv ntawm kub . A tshuaj cov tshuaj tiv thaiv uas tso tawm kub hu ua exothermic reaction. Tab sis tshuaj cov tshuaj tiv thaiv kuj tuaj yeem nqus tau kub los ntawm ib puag ncig thiab tau txias.

Puas yog Boiling Dej endothermic lossis exothermic?

Peb txhua tus tuaj yeem txaus siab rau qhov ntawd dej tsis spontaneously boil ntawm chav tsev kub; xwb peb yuav tsum tau cua sov nws. Vim peb yuav tsum ntxiv cua sov, boiling dej yog ib txoj kev uas chemists hu endothermic . Kom meej meej, yog tias qee cov txheej txheem xav tau cua sov, lwm tus yuav tsum muab cov cua sov thaum lawv ua. Cov no yog hu ua exothermic.

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