Video: Dab tsi yog tus qauv enthalpy ntawm kev tsim rau sulfur dioxide?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txhawm rau kuaj xyuas, nws yuav tsum yog (−296.81 ± 0.20) kJ / mol. Koj yuav tsum siv NIST ntau zaus. Kuv tau txais -310.17 kJ / mol tab sis. Koj yuav tsum saib ΔH∘f rau SO3(g) ua ntej.
Ib yam li ntawd, koj tuaj yeem nug, tus qauv enthalpy ntawm kev tsim ntawm o2 yog dab tsi?
Cov txheem enthalpy ntawm tsim ntawm O2 sib npaug rau 0 vim tias diatomic oxygen hauv daim ntawv roj yog nws daim ntawv ruaj khov (koj tuaj yeem sib piv nrog nws cov ntaub ntawv tsis ruaj khov kom pom: monoatomic daim ntawv O, triatomic daim ntawv O3, thiab lwm yam).
Kuj Paub, koj ua li cas thiaj nrhiav tau tus qauv enthalpy ntawm kev tsim? Qhov no kev sib npaug qhov tseem ceeb hais tias cov txheem enthalpy hloov ntawm tsim yog sib npaug rau cov sum standard enthalpies ntawm kev tsim ntawm cov khoom rho tawm cov sum ntawm cov standard enthalpies ntawm kev tsim ntawm cov reactants. thiab cov txheem enthalpy ntawm kev tsim Tus nqi: ΔH fo[A] = 433 KJ/mol. Δ H fo[B] = -256 KJ/mol.
Tsis tas li ntawd, qhov kub ntawm kev tsim ntawm so2 yog dab tsi?
Enthalpy ntawm kev tsim cov roj ntawm cov txheej txheem (nominally 298.15 K, 1 atm.)
| ΔfH°gas (kJ/mol) | -296.81 ± 0.20 |
| Txoj kev | Saib xyuas |
| Kev siv | Cox, Wagman, et al., 1984 |
| Saib | |
|---|---|
| CODATA Review tus nqi | |
Cov ntsiab lus twg muaj tus qauv enthalpy ntawm kev tsim ntawm xoom?
Tag nrho cov ntsiab lus nyob rau hauv lawv cov txheej txheem (cov pa oxygen, cov pa roj carbon ntau hauv daim ntawv ntawm graphite , thiab lwm yam) muaj tus qauv enthalpy ntawm kev tsim ntawm xoom, vim tsis muaj kev hloov pauv hauv lawv qhov tsim.
Pom zoo:
Dab tsi yog txhais los ntawm tus qauv enthalpy ntawm cov tshuaj tiv thaiv?
Tus txheej txheem enthalpy ntawm cov tshuaj tiv thaiv (tus cim Δ Hr?) yog qhov hloov pauv enthalpy uas tshwm sim hauv lub cev thaum teeb meem hloov pauv los ntawm cov tshuaj tiv thaiv tshuaj, thaum tag nrho cov reactants thiab cov khoom nyob rau hauv lawv cov txheej txheem. Rau ib tug generic tshuaj tiv thaiv
Dab tsi yog qhov enthalpy ntawm kev tsim ntawm Cao?
Table of Heats of Formation Compound ΔHf (kJ/mol) CaCO3 -1207.0 CaO(s) -635.5 Ca(OH)2(s) -986.6 CaSO4(s) -1432.7
Tus qauv ntsuas kub thiab siab yog dab tsi Vim li cas tus qauv tsim nyog?
Cov txheej txheem siv cov txheej txheem yog qhov tseem ceeb rau kev qhia txog cov kua dej ntws thiab qhov ntim ntawm cov kua thiab cov pa roj, uas yog nyob ntawm qhov kub thiab txias. STP feem ntau yog siv thaum cov txheej txheem hauv xeev raug siv rau kev suav
Tus qauv qauv yog dab tsi Qhov txawv ntawm tus qauv qauv thiab tus qauv molecular yog dab tsi?
Cov mis mos molecular siv cov cim tshuaj thiab cov ntawv sau npe los qhia cov naj npawb ntawm cov atoms sib txawv hauv cov molecule lossis compound. Ib qho empirical formula muab qhov yooj yim tshaj plaws, tag nrho tus lej piv ntawm atoms hauv ib qho chaw. Cov qauv qauv qhia txog kev sib koom ua ke ntawm cov atoms hauv cov molecule
Yuav ua li cas koj pom tus qauv enthalpy ntawm tsim los ntawm combustion?
Tus qauv enthalpy ntawm cov tshuaj tiv thaiv (Δ Horxn) tuaj yeem xam los ntawm cov lej ntawm cov qauv enthalpies ntawm kev tsim cov khoom (txhua qhov sib npaug los ntawm nws cov stoichiometric coefficient) rho tawm cov lej ntawm cov qauv enthalpies ntawm kev tsim cov reactants (txhua qhov sib npaug los ntawm nws. stoichiometric coefficient) - "cov khoom