Cov txheej txheem:

Cov dej tuaj yeem hloov pauv ntawm ib daim ntawv mus rau lwm qhov?
Cov dej tuaj yeem hloov pauv ntawm ib daim ntawv mus rau lwm qhov?

Video: Cov dej tuaj yeem hloov pauv ntawm ib daim ntawv mus rau lwm qhov?

Video: Cov dej tuaj yeem hloov pauv ntawm ib daim ntawv mus rau lwm qhov?
Video: Tus Cawm Seej Hloov Neeg Txoj Hmoo (HD) 2024, Kaum ib hlis
Anonim

Teeb meem tuaj yeem hloov ntawm ib qho xeev rau lwm yog cua sov los yog txias. Yog hais tias dej khov (ib qho khoom) yog rhuab nws kev hloov rau dej (ib kua). Yog dej yog cua sov, nws kev hloov rau ncu (gas). Qhov no hloov hu ua BOILING.

Raws li txoj cai, peb tuaj yeem hloov daim ntawv dej li cas?

Daim ntawv hloov dej los ntawm cov kua rau roj los ntawm cov txheej txheem ntawm evaporation. Dej vapor kuj hloov rov qab mus rau cov kua los ntawm cov txheej txheem ntawm condensation. Condensation thiab evaporation yog ob txheej txheem uas tseem ceeb heev rau cov dej lub voj voog yuav tshwm sim.

Qhov thib ob, dab tsi yog tus txheej txheem ntawm kev hloov dej rau hauv dej khov hu ua? Thaum lub dej hloov los ntawm cov kua theem (uas yog, dej ) mus rau theem khoom (uas yog, dej khov ), cov txheej txheem yog lub npe hu ua khov. Ntawd yog, rau khov 1 mole ntawm dej ntawm 0 degrees Celsius, 6 kJ ntawm tshav kub poob rau ib puag ncig los yog muab tawm. Yog li ntawd, freezing yog exothermic txheej txheem.

Ib yam li ntawd, dej tuaj yeem hloov daim ntawv piav qhia?

Ib yam li txhua yam khoom, dej tau muaj nyob rau hauv peb qhov sib txawv daim ntawv , hu ua states: solid, liquid and gas. Lub xeev yuav hloov thaum cov khoom cua sov. Thaum cov khoom yog rhuab, nws hloov mus ua kua. Raws li cov kua, cov khoom muaj lub ntim ruaj khov, tab sis nws cov duab kev hloov los sau cov duab ntawm nws lub thawv.

Dab tsi yog 3 hom dej?

Dej tuaj yeem tshwm sim hauv peb lub xeev: khoom (dej), kua, lossis roj (vapor)

  • Cov dej khov nab kuab yog dej khov. Thaum dej khov, nws cov molecules txav mus deb sib nrug, ua rau dej khov tsawg dua dej.
  • Cov dej ua kua yog ntub thiab dej.
  • Dej raws li ib tug gas-vapor yog ib txwm muaj nyob rau hauv cov huab cua nyob ib ncig ntawm peb.

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