Video: Dab tsi yog enthalpy entropy Gibbs dawb zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Gibbs free zog ua ke enthalpy thiab entropy rau hauv ib qho nqi. Gibbs free zog yog cov zog cuam tshuam nrog cov tshuaj tiv thaiv uas tuaj yeem ua haujlwm tau zoo. Nws sib npaug cov enthalpy rho tawm cov khoom ntawm qhov kub thiab txias entropy ntawm qhov system. Yog tias ΔG tsis zoo, ces cov tshuaj tiv thaiv yog tshwm sim.
Xav txog qhov no, dab tsi yog entropy enthalpy thiab lub zog dawb?
Gibbs Dawb zog . Enthalpy yog tus nqi ntawm tshav kub zog pauv (kub absorbed los yog emitted) nyob rau hauv ib tug chemical txheej txheem nyob rau hauv tas li lub siab. Entropy ntsuas tus nqi ntawm cov cua kub dispersed los yog pauv thaum lub sij hawm tshuaj.
Ib yam li ntawd, enthalpy cuam tshuam li cas rau entropy? Enthalpy (H) txhais tau tias yog lub zog tso tawm lossis nqus tau thaum muaj tshuaj lom neeg. Entropy (S) txhais cov degree ntawm randomness los yog tsis meej pem nyob rau hauv ib tug system. Yog li ntawd, lub zog pub dawb qhia kev sib raug zoo ntawm enthalpy thiab entropy.
Ua li no, koj yuav ua li cas paub yog tias nws enthalpy lossis entropy tsav?
Cov tshuaj tiv thaiv tuaj yeem yog ' tsav los ntawm enthalpy ' (qhov twg cov tshuaj tiv thaiv exothermic heev (tsis zoo ΔH) kov yeej qhov txo qis hauv entropy ) lub ' tsav los ntawm entropy ' qhov twg cov tshuaj tiv thaiv endothermic tshwm sim vim yog qhov zoo heev ΔS. Piv txwv 1: Kev tsim ntawm NaCl(s) los ntawm nws cov ntsiab lus yog spontaneous thiab tso tawm ntau heev ntawm tshav kub.
Koj txhais li cas enthalpy?
Enthalpy yog ib qho khoom siv thermodynamic ntawm ib qho system. Nws yog tus lej ntawm lub zog sab hauv ntxiv rau cov khoom ntawm lub siab thiab ntim ntawm qhov system. Nws qhia txog lub peev xwm ua haujlwm tsis yog siv tshuab thiab lub peev xwm tso tawm cua sov. Enthalpy yog denoted li H; tshwj xeeb enthalpy npe h.
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