Video: Dab tsi yog enthalpy ntawm ib qho system?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Enthalpy yog ib tug thermodynamic khoom ntawm a qhov system . Nws yog tus lej ntawm lub zog sab hauv ntxiv rau cov khoom ntawm lub siab thiab ntim ntawm lub qhov system . Nws qhia txog lub peev xwm los ua cov haujlwm tsis siv tshuab thiab lub peev xwm tshem tawm cov cua sov. Enthalpy yog denoted li H; tshwj xeeb enthalpy npe h.
Tib neeg kuj nug, ua li cas koj xam enthalpy ntawm ib qho system?
Hauv cov cim, cov enthalpy , H, sib npaug cov sum ntawm lub zog sab hauv, E, thiab cov khoom ntawm lub siab, P, thiab ntim, V, qhov system : H = E + PV. Raws li txoj cai ntawm kev txuag hluav taws xob, kev hloov hauv lub zog sab hauv yog sib npaug kub pauv mus rau, tsawg dua cov haujlwm ua los ntawm, lub qhov system.
enthalpy txhais tau li cas rau kaw qhov system? Cov enthalpy ntawm a kaw homogeneous qhov system yog nws lub zog cardinal muaj nuj nqi, nrog natural statevariables nws entropy thiab nws lub siab.
Ua kom pom qhov no, enthalpy piv txwv li cas?
Piv txwv ntawm enthalpy kev hloov pauv suav nrog enthalpy ntawm combustion, enthalpy ntawm fusion, enthalpy ntawm vaporization, thiab tus qauv enthalpy kev tsim tawm.
Dab tsi yog enthalpy ntawm ib yam khoom?
Tus qauv enthalpy ntawm kev tsim yog ib qho kev ntsuas ntawm lub zog tso tawm los yog noj thaum ib tug mole ntawm ib yam khoom yog tsim nyob rau hauv tus qauv tej yam kev mob los ntawm nws pureelements. Lub cim ntawm tus qauv enthalpy kev tsim tawm ΔH f. Δ = A change in enthalpy .o. = A degree qhia tias nws yog tus qauv enthalpy hloov.
Pom zoo:
Dab tsi yog qhov txawv ntawm ib qho ultramafic ib qho mafic nruab nrab thiab felsic pob zeb?
Hauv cov txheej txheem kev faib tawm silica-cov ntsiab lus dav dav, pob zeb nrog ntau dua 65 feem pua silica hu ua felsic; cov uas muaj li ntawm 55 thiab 65 feem pua silica yog nruab nrab; cov uas muaj li ntawm 45 thiab 55 feem pua silica yog mafic; thiab cov uas tsawg dua 45 feem pua yog ultramafic
Dab tsi yog thawj kauj ruam ntawm kev tsim ib qho perpendicular los ntawm ib qho taw tes mus rau kab?
Txuas tus taw tes rau qhov taw tes uas cov arcs sib tshuam. Siv ib tug straightedge los xyuas kom meej cov kab yog ncaj. Txoj kab koj kos yog perpendicular rau thawj kab, los ntawm qhov muab taw tes rau ntawm kab
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua
Dab tsi yog txhais los ntawm lub sij hawm dissociation thiab dab tsi yog ib qho piv txwv ntawm cov khoom uas dissociates?
Dissociation, nyob rau hauv chemistry, sib cais ntawm ib yam khoom mus rau hauv atoms los yog ions. Thermal dissociation tshwm sim ntawm qhov kub thiab txias. Piv txwv li, hydrogen molecules (H 2) dissociate rau hauv atoms (H) ntawm kub heev; ntawm 5,000 ° K txog 95% ntawm cov molecules hauv cov qauv ntawm hydrogen yog dissociated rau hauv atoms
Lub ntsiab txhais ntawm kev daws ntawm ib qho system yog dab tsi?
Definition (Solution sets) Ib qho kev daws teeb meem ntawm qhov kev sib npaug yog cov npe ntawm cov lej x, y, z, uas ua rau tag nrho cov kab zauv muaj tseeb ib txhij. Qhov kev daws teeb meem ntawm ib qho kev sib npaug ntawm qhov sib npaug yog sau los ntawm txhua qhov kev daws teeb meem