Cov txheej txheem:

Dab tsi cuam tshuam rau Delta H?
Dab tsi cuam tshuam rau Delta H?

Video: Dab tsi cuam tshuam rau Delta H?

Video: Dab tsi cuam tshuam rau Delta H?
Video: The Basics - PFC Airway CPG 2024, Kaum ib hlis
Anonim

Peb yam tuaj yeem cuam tshuam rau enthalpy ntawm cov tshuaj tiv thaiv:

  • Cov concentrations ntawm cov reactants thiab cov khoom.
  • Cov kub ntawm qhov system.
  • Lub siab ib nrab ntawm cov pa roj (yog tias muaj)

Ib yam li ntawd, nws raug nug, dab tsi cuam tshuam rau delta H?

Lub xeev ntawm reactants thiab cov khoom (khoom, kua, los yog roj) cuam tshuam tus nqi enthalpy rau ib qho system. Cov kev taw qhia ntawm cov tshuaj tiv thaiv cuam tshuam tus nqi enthalpy. Ib qho tshuaj tiv thaiv uas tshwm sim nyob rau hauv qhov kev coj rov qab muaj tib tus lej enthalpy tus nqi, tab sis cov cim qhia.

Ib yam li ntawd, ntawm dab tsi enthalpy nyob ntawm? Cov xwm txheej cuam tshuam Enthalpy -Nws nyob ntawm raws li peb lub xeev ua haujlwm hauv lub zog, siab thiab ntim. Enthalpy kuj yog lub xeev muaj nuj nqi. Lub xeev muaj nuj nqi yog cov cuab yeej ntawm lub system, nws tus nqi nyob ntawm tsuas yog raws li lub xeev ntawm lub system thiab yog ywj siab ntawm yhe txoj kev los yog yam uas lub xeev mus txog.

Ntxiv rau qhov no, dab tsi yog qhov cuam tshuam rau delta E thiab delta H?

Peb yam tseem ceeb tshwj xeeb tshaj yog: (1) qhov ntau ntawm cov reactants thiab cov khoom muaj feem xyuam nrog cov tshuaj tiv thaiv, (2) kub ntawm qhov system, thiab (3) ib feem siab ntawm tej gases koom nrog hauv cov tshuaj tiv thaiv.

Qhov loj npaum li cas cuam tshuam rau enthalpy hloov?

Zog, ntim thiab enthalpy yog tag nrho cov khoom dav dav. Lawv tus nqi nyob ntawm tus pawg ntawm qhov system. Piv txwv li, lub enthalpy ntawm ib yam pawg ntawm ib tug roj yog ob npaug rau yog hais tias tus pawg yog ob npaug; tus enthalpy ntawm ib qho system uas muaj ntau qhov chaw yog sib npaug rau cov lej ntawm cov enthalpies ntawm qhov chaw.

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