Cov txheej txheem:
Video: Vim li cas ethyl cawv muaj qhov kub siab tshaj li methyl cawv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ethanol muaj qhov kub siab dua li Methanol . Yog li ntawd, lub zog ntau dua yuav tsum tau kov yeej cov kev sib cuam tshuam hauv lub cev, ua rau muaj qhov nce ntxiv boiling / yaj cov ntsiab lus.
Hauv qhov no, vim li cas ethyl cawv muaj qhov kub siab dua?
Vim tias hydrogen bonds feem ntau muaj zog ntau dua li lub sijhawm dipole zoo tib yam, ib pawg ntawm ethanol molecules yog ib qho nyuaj rau kev sib cais ntawm ib leeg tshaj ib pawg ntawm dimethyl ether molecules. Cov ethanol muaj ntau siab kub taw tes.
Tsis tas li ntawd, dab tsi cuam tshuam qhov kub ntawm cov cawv? Cov boiling point ntawm cawv kuj nce asthe ntev ntawm hydrocarbon saw nce . Yog vim li cas cawv muaj siab dua kub point tshaj alkanes yog vim lub zog ntawm intermolecular cawv yog hydrogenbonds, tsis zoo li alkanes nrog van der Waals rog ua lawv lub zog nruab nrab.
Raws li txoj cai, cov cawv twg muaj qhov kub siab tshaj plaws?
Yog tias ib tus xav txog cov ntsiab lus kub (hauv ° C) ntawm cov dej cawv thawj zaug, ib tus pom cov hauv qab no:
- Methanol: 65.
- ethanol:79 ua.
- 1:97.
- 1-Butanol: 117.
- 1- PIB: 138.
Puas yog thawj lossis theem nrab cawv puas muaj cov ntsiab lus kub dua?
Hydroxyl pawg ntawm a thawj cawv yog ntau "exposed" tshaj nws yog nyob rau hauv ib cawv thib ob (uas yog flanked los ntawm ob pawg alkyl loj), yog li nws yuav zoo dua rau hydrogen daim ntawv cog lus nrog lwm yam cawv (qhov zoo sib xws rau theem nrab vs qib cawv ).
Pom zoo:
Qhov twg muaj qhov kub siab tshaj plaws CCl4 cf4 lossis CBr4?
Qhov nyob ntawm tus naj npawb ntawm electrons. CBr4 muaj 146, piv nrog 42 hauv CF4 thiab 74 hauv CCl4. CBr4 yog qhov kub siab tshaj plaws
Qhov kub ntawm qhov hluav taws kub kub li cas?
Feem ntau hom ntoo yuav pib combusting ntawm li 300 degrees Celsius. Cov pa roj hlawv thiab nce qhov kub ntawm cov ntoo mus txog 600 degrees Celsius (1,112 degrees Fahrenheit). Thaum cov ntoo tso tawm tag nrho nws cov gases, nws tawm charcoal thiab tshauv
Qhov twg electromagnetic yoj muaj qhov luv tshaj wavelength thiab siab tshaj plaws zaus?
Gamma rays muaj lub zog siab tshaj plaws, qhov luv tshaj wavelengths, thiab cov zaus siab tshaj plaws. Cov xov tooj cua tsis muaj zog, ntawm qhov tod tes, muaj lub zog qis tshaj plaws, qhov ntev tshaj plaws wavelengths, thiab qis tshaj zaus ntawm txhua hom EM hluav taws xob
Thaum tshav kub kub muaj peev xwm vs tshwj xeeb tshav kub yog dab tsi?
Molar Thaum tshav kub kub muaj peev xwm yog ib qho kev ntsuas ntawm cov cua sov uas tsim nyog los nce qhov kub ntawm ib mole ntawm ib tug ntshiab tshuaj los ntawm ib tug degree K. Tshwj xeeb kub muaj peev xwm yog ib qho kev ntsuas ntawm tus nqi ntawm cov cua sov tsim nyog los nce qhov kub ntawm ib gram ntawm ib tug ntshiab. khoom los ntawm ib degree K
Dab tsi yog qhov siab tshaj plaws ntawm qhov poob siab tso cai rau hauv av xaim?
NEC pom zoo tias qhov siab tshaj plaws ua ke voltage poob rau ob qho tib si feeder thiab ceg Circuit Court yuav tsum tsis txhob ntau tshaj 5%, thiab qhov siab tshaj plaws ntawm lub feeder lossis ceg Circuit Court yuav tsum tsis txhob ntau tshaj 3% (Fig. 1). Qhov kev pom zoo no yog qhov teeb meem kev ua haujlwm, tsis yog teeb meem kev nyab xeeb