Video: Yuav ua li cas koj xam ln k?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Arrhenius Kev sib npaug : ln k = -Ea/R (1/T) + ln (A) <----- qhov no yog y = mx + b daim ntawv ntawm tus kev sib npaug , txawm li cas los kuv muaj teeb meem nkag siab yuav daws li cas. ln k = - 0.0008313/8.314 J/mol K (1/298 K ) + ln (-0.8794) <---- qhov no yog qhov kuv teeb tsa cov lej tab sis kuv tsis xav tias nws yog
Ntawm no, Ln K yog dab tsi hauv chemistry?
lnk = ln (Ae-Ea/RT) = ln A+ ln (e-Ea/RT) lnk = ln A+-EaRT=(-EaR)(1T)+ ln A. uas yog qhov sib npaug ntawm txoj kab ncaj nraim uas nws txoj kab nqes yog -Ea / R. Qhov no ua rau txoj kev yooj yim ntawm kev txiav txim siab ua kom lub zog los ntawm qhov tseem ceeb ntawm k pom ntawm qhov sib txawv kub, los ntawm kev npaj lnk raws li kev ua haujlwm ntawm 1 / T.
Tsis tas li ntawd, tus nqi tas li k yog dab tsi? Cov tus nqi tas li , k , yog proportionality tas li uas qhia txog kev sib raug zoo ntawm molar concentration ntawm reactants thiab cov tus nqi ntawm ib qho tshuaj tiv thaiv.
Tib neeg kuj nug, dab tsi yog lub mis rau kev ua kom lub zog?
Kev txiav txim siab ua kom muaj zog. Daim ntawv ceeb toom tias thaum Arrhenius equation yog rearranged li saum toj no nws yog ib tug linear kab zauv nrog rau daim ntawv y = mx + b; y yog ln(k), x yog 1/T, thiab m yog -Eib/R. Lub zog ua kom muaj zog rau cov tshuaj tiv thaiv tuaj yeem txiav txim siab los ntawm kev nrhiav cov txoj kab nqes ntawm kab.
Dab tsi yog units rau tus nqi tas li k?
Cov units ntawm k nyob ntawm qhov kev txiav txim ntawm cov tshuaj tiv thaiv, tab sis cov units yeej tsis yog Newtons ib 'meter'. Piv txwv li, rau qhov kev txiav txim thawj zaug, k muaj cov units ntawm 1 / s thiab rau qhov kev txiav txim thib ob, units ntawm 1/M.s.
Pom zoo:
Yuav ua li cas koj xam tus qauv sib txawv ntawm PMP?
Cov mis siv nyob rau hauv PMBOK rau tus qauv sib txawv yog yooj yim. Nws tsuas yog (P-O) / 6. Qhov ntawd yog qhov pessimistic kev ua ub no kwv yees rho tawm qhov kev kwv yees qhov kev xav tau muab faib los ntawm rau. Qhov teeb meem yog qhov no nyob rau hauv tsis muaj txoj kev zoo los yog daim ntawv tsim ib qho kev ntsuas ntawm tus qauv deviation
Yuav ua li cas koj xam qhov ncig ntawm lub ntiaj teb ntawm nws latitude?
Circumference ntawm lub voj voog yog sib npaug rau 2 π r qhov twg r yog nws lub vojvoog. Nyob rau hauv lub ntiaj teb no, lub circumference ntawm tus kheej ntawm ib tug muab latitude yog 2πr(cos θ) qhov twg θ yog lub latitude thiab r yog lub vojvoog ntawm lub ntiaj teb ntawm kab zauv
Yuav ua li cas koj xam qhov zaus ntawm zaus thiab feem pua?
Ua li no, faib cov zaus los ntawm tag nrho cov txiaj ntsig thiab muab faib los ntawm 100. Hauv qhov no, qhov zaus ntawm thawj kab yog 1 thiab tag nrho cov txiaj ntsig yog 10. Qhov feem pua yog tom qab ntawd yog 10.0. Cov kab kawg yog qhov feem pua Cumulative
Yuav ua li cas koj xam lub sij hawm nws yuav siv sij hawm mus ncig teb chaws?
Kwv yees seb koj yuav mus sai npaum li cas ntawm koj qhov kev mus ncig. Tom qab ntawd, faib koj qhov kev ncua deb ntawm koj qhov nrawm. Qhov no yuav muab rau koj anestimation ntawm koj lub sijhawm mus ncig. Piv txwv li, yog tias koj mus ncig yog 240 mais thiab koj yuav tsav 40 mais ib teev, koj lub sijhawm yuav yog 240/40 = 6hours
Yuav ua li cas koj xam lub sij hawm nws yuav siv ib yam khoom los poob?
Ntsuas qhov deb ntawm qhov khoom yuav poob hauv ko taw nrog tus pas ntsuas lossis ntsuas daim kab xev. Faib qhov kev ncua deb los ntawm 16. Piv txwv li, yog tias cov khoom yuav poob 128 ko taw, faib 128 los ntawm 16 kom tau 8. Xam cov square root ntawm cov kauj ruam 2 los nrhiav lub sij hawm nws yuav siv cov khoom poob hauv vib nas this