Hauj lwm lawm
Hydrogen peroxide yog cov tshuaj sib xyaw nrog cov mis H2O2. Nyob rau hauv nws daim ntawv ntshiab, nws yog ib tug daj ntseg xiav kua uas yog me ntsis viscous dua dej. Nws yog siv los ua oxidizer, tshuaj dawb, thiab tshuaj tua kab mob, feem ntau yog cov tshuaj diluted (3 feem pua -6 feem pua ntawm qhov hnyav) hauv dej rau cov neeg siv khoom, thiab ntau dua rau kev siv hauv kev lag luam. Concentrated hydrogen peroxide, los yog "high-test peroxide", decomposes explosively thaum rhuab thiab tau siv raws li ib tug propellant nyob rau hauv rocketry.
Hydrogen peroxide yog hom pa oxygen reactive thiab yooj yim tshaj plaws peroxide, ib qho chaw uas muaj cov pa oxygen-oxygen ib daim ntawv cog lus. Nws decomposes maj mam mus rau hauv dej thiab elemental oxygen thaum raug lub teeb, thiab sai sai nyob rau hauv muaj cov organic los yog reactive tebchaw. Nws yog feem ntau khaws cia nrog lub stabilizer hauv cov kua qaub uas tsis muaj zog hauv lub raj mis tsaus los thaiv lub teeb. Nws muaj nyob rau hauv cov kab mob lom nrog rau tib neeg lub cev. Enzymes uas siv los yog decompose hydrogen peroxide yog cais raws li peroxidases.
Hydrogen peroxide (H2O2) yog nonplanar molecule nrog (twisted) C2 symmetry; qhov no yog thawj zaug pom los ntawm Paul-Antoine Giguère hauv xyoo 1950 siv infrared spectroscopy. Txawm hais tias O-O daim ntawv cog lus yog ib daim ntawv cog lus, cov molecule muaj qhov kev sib hloov siab ntawm 386 cm-1 (4.62 kJ / mol) rau kev sib hloov ntawm enantiomers ntawm kev teeb tsa, thiab 2460 cm-1 (29.4 kJ / mol) los ntawm cis configuration.Cov teeb meem no tau npaj siab yuav yog vim muaj kev cuam tshuam ntawm ib leeg khub ntawm cov pa oxygen atoms uas nyob ib sab thiab cov teebmeem dipolar ntawm ob O-H daim ntawv cog lus. Rau kev sib piv, qhov sib hloov barrier rau ethane yog 1040 cm-1 (12.4 kJ / mol).Qhov kwv yees li ntawm 100 degree dihedral lub kaum sab xis ntawm ob O-H bonds ua rau molecule chiral. Nws yog qhov me me thiab yooj yim tshaj plaws molecule los nthuav tawm enantiomerism. Nws tau raug pom zoo tias kev sib cuam tshuam enantiospecific ntawm ib qho es tsis yog lwm qhov yuav ua rau muaj kev nthuav dav ntawm ib daim ntawv enantiomeric ntawm ribonucleic acids thiab yog li lub hauv paus ntawm homochirality hauv RNA ntiaj teb.Cov qauv molecular ntawm gaseous thiab crystalline H2O2 yog qhov sib txawv. Qhov sib txawv no yog ntaus nqi los ntawm kev cuam tshuam ntawm hydrogen bonding, uas tsis nyob hauv lub xeev gaseous.
Cov ntsiab lus kub ntawm H2O2 tau raug ntxiv raws li 15{10}}.2 degree (302.4 degree F), kwv yees li 50 degree (90 degree F) siab dua dej. Hauv kev xyaum, hydrogen peroxide yuav raug cuam tshuam los ntawm thermal decomposition yog tias kub rau qhov kub no. Tej zaum nws yuav muaj kev nyab xeeb distilled ntawm qhov kub thiab txias nyob rau hauv lub siab txo.Nyob rau hauv aqueous daws, hydrogen peroxide txawv los ntawm cov ntshiab tshuaj vim muaj kev cuam tshuam ntawm hydrogen bonding ntawm dej thiab hydrogen peroxide molecules. Hydrogen peroxide thiab dej tsim ib qho sib xyaw eutectic, nthuav tawm qhov kev nyuaj siab ntawm qhov chaw txias kom qis li -56 degree ; Cov dej ntshiab muaj qhov khov ntawm 0 degree thiab ntshiab hydrogen peroxide ntawm -0.43 degree . Lub boiling point ntawm tib cov mixs kuj yog kev nyuaj siab nyob rau hauv kev sib raug zoo nrog lub ntsiab lus ntawm ob boiling ntsiab lus (125.1 degree). Nws tshwm sim ntawm 114 degree. Qhov kub kub no yog 14 degree ntau dua li cov dej ntshiab thiab 36.2 degree tsawg dua li cov ntshiab hydrogen peroxide.
Cim npe nrov: chemical zog ntawm hydrogen peroxide, Tuam Tshoj, lwm tus neeg, manufacturers, hoobkas, customized, lag luam wholesale, pheej yig, luv nqi, luv nqi, dawb qauv
