Qhov sib txawv tseem ceeb ntawm hexane thiab n-hexane yog hexane muaj cov qauv tsim, whereas n-hexane yog cov qauv hexane uas tsis muaj ceg.
Organic molecules yog cov molecules uas muaj carbons. Hydrocarbons yog cov organic molecules uas muaj tsuas yog carbon thiab hydrogen atoms. Hydrocarbons tuaj yeem ua rau aromatic lossis aliphatic. Lawv feem ntau muab faib ua ob peb hom xws li alkanes, alkenes, alkynes, cycloalkanes thiab aromatic hydrocarbons. Hexane thiab n-hexane yog alkanes, lossis lwm yam, hu ua saturated hydrocarbons. Lawv muaj ntau tshaj plaws ntawm hydrogen atoms ib molecule yuav haum. Txhua daim ntawv cog lus ntawm carbon atoms thiab hydrogens yog ib daim ntawv cog lus. Li no, daim ntawv cog lus sib hloov tau tso cai ntawm ib qho atoms. Lawv yog hom yooj yim tshaj plaws ntawm hydrocarbons. Saturated hydrocarbons muaj cov qauv dav dav ntawm CnH2n + 2. Cov xwm txheej no txawv me ntsis rau cycloalkanes vim lawv muaj cov qauv cyclic.
Hexane yog dab tsi?
Raws li tau hais los saum no, hydrocarbon yog ib qho saturated alkane. Nws muaj rau carbon atoms; Yog li, muaj cov qauv ntawm C6H14 Cov molar loj ntawm hexane yog 86.18 g mol−1 Hexane yog lub npe siv los qhia tag nrho cov molecules nrog cov qauv no. Muaj ntau tus qauv isomers peb tuaj yeem kos kom phim cov qauv no tab sis, hauv IUPAC nomenclature, peb siv hexane tshwj xeeb los qhia txog cov molecule unbranched, thiab nws tseem hu ua n-hexane. Lwm cov qauv isomers zoo li methylated molecules ntawm pentane thiab butane. Lawv hu ua isohexane thiab neohexane. Lawv muaj cov qauv hauv qab no.
Los ntawm cov qauv hexane, 2-methylpentane, 3-methylpentane thiab 2, 3-dimethylbutane yog cov piv txwv ntawm isohexane, whereas 2, 2-dimethylbutane yog ib qho piv txwv rau neohexane.
Hexane feem ntau yog tsim nyob rau hauv cov txheej txheem roj refining. Hexane muab rho tawm thaum cov roj kub kub ntawm 65-70 ° C. Txij li thaum hexane isomers muaj cov ntsiab lus kub zoo sib xws, lawv evaporate ntawm qhov kub thiab txias. Txawm li cas los xij, lawv cov ntsiab lus melting txawv. Hexane nyob rau hauv daim ntawv ua kua nyob rau hauv chav tsev kub thiab muaj ib tug tsw zoo li roj av. Nws yog cov kua uas tsis muaj xim. Hexane dissolves me ntsis hauv dej. Nyob rau hauv chav tsev kub, nws nyiam evaporate maj mam mus rau hauv qhov chaw. Hexane vapor tuaj yeem tawg thiab hexane nws tus kheej yog cov nplaim taws heev. Hexane yog cov kuab tshuaj uas tsis yog-polar, thiab nws yog siv los ua cov kuab tshuaj hauv lub chaw kuaj mob.
Tsis yog cov ntshiab hexane tsuas yog siv los ua cov kuab tshuaj xwb, tab sis muaj ntau hom kuab tshuaj uas siv hexane. Tsis tas li ntawd, hexane yog siv los ua cov khoom tawv tawv, cov nplaum, rau kev tsim textile, cov khoom ntxuav, thiab lwm yam. Hexane yog siv los rho tawm cov khoom tsis muaj polar xws li roj thiab roj thaum ntsuas dej thiab av.
N-Hexane yog dab tsi?
n -Hexane lossis hexane ib txwm yog cov qauv tsis muaj ceg ntawm hexane nrog cov qauv molecular C6H14 Lub boiling point ntawm n-hexane yog 68.7 o C, thaum lub melting point yog −95.3 oC. n-hexane yog siv rau hauv cov txheej txheem ntawm cov roj los ntawm cov noob xws li safflower, soybean thiab paj rwb.
Qhov txawv ntawm Hexane thiab n-Hexane yog dab tsi?
Hexane yog ib qho sib xyaw ntawm cov khoom sib xyaw nrog cov qauv C6H14 Hexane muaj cov qauv tsim, whereas n-hexane yog ib qho un -Branched hexane qauv. n-Hexane yog cov qauv isomer ntawm hexane. Ntxiv mus, n-Hexane muaj qhov kub siab dua piv rau lwm cov hexane. Txawm li cas los xij, tag nrho, lawv cov ntsiab lus kub kub poob hauv qhov kub me me. Tsis tas li ntawd, n-Hexane muaj qhov vapor siab ntawm chav tsev kub.
Summary – Hexane vs n-Hexane
n-Hexane yog cov qauv isomer ntawm hexane. Qhov sib txawv tseem ceeb ntawm hexane thiab n-hexane yog tias hexane muaj cov qauv tsim, thaum n-hexane yog ib qho qauv hexane tsis muaj ceg.
Image Courtesy:
1. “CNX Chem 20 01 ex1 15 img” Los ntawm OpenStax – (CC BY 4.0) via Commons Wikimedia
