Dab tsi yog ?H tus nqi ntawm kev hloov pauv hluav taws xob sab nraud?
Dab tsi yog ?H tus nqi ntawm kev hloov pauv hluav taws xob sab nraud?

Video: Dab tsi yog ?H tus nqi ntawm kev hloov pauv hluav taws xob sab nraud?

Video: Dab tsi yog ?H tus nqi ntawm kev hloov pauv hluav taws xob sab nraud?
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Kaum ib hlis
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Δ H yog txiav txim los ntawm qhov system, tsis yog ib puag ncig ib puag ncig hauv cov tshuaj tiv thaiv. Ib qho system uas tso cua sov rau ib puag ncig, ib exothermic tshuaj tiv thaiv, muaj qhov tsis zoo Δ H los ntawm convention, vim lub enthalpy ntawm cov khoom yog qis dua cov enthalpy ntawm cov reactants ntawm lub system.

Tsuas yog li ntawd, kev hloov pauv exothermic yog dab tsi?

Ib exothermic cov tshuaj tiv thaiv yog cov tshuaj tiv thaiv uas tso tawm cua sov. Nws muab net zog rau nws ib puag ncig. Ntawd yog, lub zog xav tau los pib cov tshuaj tiv thaiv tsawg dua li lub zog tso tawm. Thaum qhov nruab nrab nyob rau hauv uas cov tshuaj tiv thaiv yog coj qhov chaw sau cua sov, cov tshuaj tiv thaiv yog exothermic.

Ib sab saum toj, nws txhais li cas thaum lub zog hloov zuj zus? Zog yog absorbed los rhuav bonds, thiab lub zog yog evolved raws li daim ntawv cog lus tau ua. Xws li cov tshuaj tiv thaiv yog hais tias yuav endothermic yog tias zog yog nyob rau hauv daim ntawv ntawm tshav kub. Qhov opposite ntawm endothermic yog exothermic; nyob rau hauv cov tshuaj tiv thaiv exothermic, zog zoo li cua sov hloov zuj zus.

Tsis tas li ntawd, lub zog hloov pauv li cas hauv cov tshuaj tiv thaiv exothermic?

Ib exothermic tshuaj tiv thaiv tshwm sim thaum lub zog siv los rhuav tshem cov ntawv cog lus hauv cov reactants (cov khoom pib) tsawg tshaj li qhov zog tso tawm thaum daim ntawv cog lus tshiab tau tsim nyob rau hauv cov khoom (cov khoom koj xaus nrog). Combustion yog ib qho piv txwv ntawm ib qho exothermic tshuaj tiv thaiv - Koj tuaj yeem hnov qhov cua sov tau muab tawm yog tias koj nyob ze dhau!

Puas yog qhov kev hloov pauv hauv enthalpy zoo lossis tsis zoo rau cov tshuaj tiv thaiv exothermic?

Txhua yam tshuaj cov tshuaj tiv thaiv koom nrog kev hloov ntawm lub zog. Endothermic cov txheej txheem xav tau ib qho kev tawm tswv yim ntawm lub zog los mus ua thiab tau kos npe los ntawm a Kev hloov pauv zoo hauv enthalpy . Exothermic cov txheej txheem tso tawm lub zog thaum ua tiav, thiab tau kos npe los ntawm a tsis zoo hloov nyob rau hauv enthalpy.

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