Dioxid de azot

Identificare
Dioxid de azot


Nume IUPAC	Dioxid de azot
Alte denumiri	oxid de azot
SMILES N(=O)[O]^[1]
Număr CAS	10102-44-0
PubChem CID	3032552
Informații generale
Formulă chimică	NO₂
Aspect	gaz roșu-brun
Masă molară	46,0055(5) g/mol
Proprietăți
Densitate	1449 kg/m³
Starea de agregare	lichid la 20 °C
Punct de topire	−11,2 °C
Punct de fierbere	21,1 °C
Presiune de vapori	720 mm Hg^[2]
Coroziv, Oxidant, Toxic,
Sunt folosite unitățile SI și condițiile de temperatură și presiune normale dacă nu s-a specificat altfel.
Modifică date / text

Dioxidul de azot este un compus chimic cu formula NO₂. Fiind unul dintre oxizii azotului, NO₂ este un intermediar în sinteza industrială a acidului azotic, milioane de tone sunt produse în fiecare an. Acest gaz toxic, roșu-brun are un miros caracteristic ascuțit și este un proeminent poluant al aerului. Dioxidul de azot este o moleculă paramagnetică.

Proprietăți

E un gaz mai greu decât aerul. La temperaturi peste 140°C este doar monomer, la temperaturi mai joase este parțial dimerizat la tetraoxid de azot iar culoarea spre incolor corespunzător nivelului de dimer care e de 100% la punctul de solidificare. Deplasarea echilibrului cu modificarea temperaturii se poate observa prin modificarea culorii^[3].

În atmosferă de dioxid de azot pot arde metale (magneziu, zinc, cupru încălzite puternic, sodiu slab încălzit, potasiu la rece) și nemetale (carbon, sulf, fosfor).

Surse generate de om si expunere

Pentru publicul larg, cele mai evidente surse de dioxid de azot sunt motoarele cu ardere internă, care ard combustibili fosili. În exterior, dioxidul de azot poate fi rezultatul traficului auto.

În spațiile închise expunere apare de la fumul de țigară, încălzire pe baza de butan și kerosen și de la sobe.

Note

^ „Dioxid de azot”, Nitrogen peroxide (în engleză), PubChem, accesat în 5 octombrie 2016
^ http://www.cdc.gov/niosh/npg/npgd0454.html Lipsește sau este vid: |title= (ajutor)
^ Ripan, Ceteanu, p. 315

Bibliografie

Linus Pauling, Chimie generală, Editura Științifică, București, 1972 (traducere din limba engleză)
Raluca Ripan, I. Ceteanu, Manual de lucrări practice de chimie anorganică - vol I Metaloizi, Editura de stat didactică și pedagogică, București, 1961

Legături externe

International Chemical Safety Card 0930
NIOSH Pocket Guide to Chemical Hazards
WHO-Europe reports: Health Aspects of Air Pollution (2003) Arhivat în 6 mai 2003, la Wayback Machine. (PDF)
Nitrogen Dioxide Air Pollution
Nitrogen dioxide pollution in the world (image)

Acest articol despre un oxid este un ciot. Puteți ajuta Wikipedia prin completarea lui.

v • d • m Oxizii azotului

N₂O • NO • NO₂ • N₂O₃ • N₂O₄ • N₂O₅

v • d • m Oxizi

Valențe variate	Tetroxid de stibiu (Sb₂O₄) • Oxid de cobalt (II,III) (Co₃O₄) • Oxid de fier (II,III) (Fe₃O₄) • Tetroxid de plumb (Pb₃O₄) • Suboxid de carbon (C₃O₂) • Oxid de mangan (II,III) (Mn₃O₄) • Oxid de argint (I,III) (AgO)

Starea de oxidare -1	Difluorură de oxigen (OF₂)

Starea de oxidare +1	Oxid de cesiu (Cs₂O) • Oxid de cupru (I) (Cu₂O) • Monoxid de dicarbon (C₂O) • Monoxid de diclor (Cl₂O) • Oxid de litiu (Li₂O) • Oxid de potasiu (K₂O) • Oxid de rubidiu (Rb₂O) • Oxid de argint (I) (Ag₂O) • Oxid de taliu (I) (Tl₂O) • Oxid de sodiu (Na₂O) • Apă (H₂O)

Starea de oxidare +2	Monoxid de aluminiu (AlO) • Oxid de bariu (BaO) • Oxid de beriliu (BeO) • Oxid de cadmiu (CdO) • Oxid de calciu (CaO) • Monoxid de carbon (CO) • Oxid de crom (II) (CrO) • Oxid de cobalt (II) (CoO) • Oxid de cupru (II) (CuO) • Oxid de fier (II) (FeO) • Oxid de plumb (II) (PbO) • Oxid de magneziu (MgO) • Oxid de mercur (II) (HgO) • Oxid de nichel (II) (NiO) • Monoxid de azot (NO) • Oxid de paladiu (II) (PdO) • Oxid de stronțiu (SrO) • Monoxid de sulf (SO) • Oxid de staniu (II) (SnO) • Oxid de titan (II) (TiO) • Oxid de vanadiu (II) (VO) • Oxid de zinc (ZnO)

Starea de oxidare +3	Oxid de aluminiu (Al₂O₃) • Trioxid de stibiu (Sb₂O₃) • Trioxid de arsen (As₂O₃) • Oxid de bismut (Bi₂O₃) • Trioxid de bor (B₂O₃) • Oxid de crom (III) (Cr₂O₃) • Trioxid de azot (N₂O₃) • Oxid de erbiu (III) (Er₂O₃) • Oxid de gadoliniu (III) (Gd₂O₃) • Oxid de galiu (III) (Ga₂O₃) • Oxid de holmiu (III) (Ho₂O₃) • Oxid de indiu (III) (In₂O₃) • Oxid de fier (III) (Fe₂O₃) • Oxid de lantan (III) (La₂O₃) • Oxid de lutețiu (III) (Lu₂O₃) • Oxid de nichel (III) (Ni₂O₃) • Trioxid de fosfor (P₂O₃) • Oxid de promețiu (III) (Pm₂O₃) • Oxid de rodiu (III) (Rh₂O₃) • Oxid de samariu (III) (Sm₂O₃) • Oxid de scandiu (III) (Sc₂O₃) • Oxid de terbiu (III) (Tb₂O₃) • Oxid de taliu (III)Tl (₂O₃) • Oxid de tuliu (III) (Tm₂O₃) • Oxid de titan (III) (Ti₂O₃) • Oxid de volfram (III) (W₂O₃) • Oxid de vanadiu (III) (V₂O₃) • Oxid de yterbiu (Yb₂O₃) • Oxid de ytriu (Y₂O₃) • Oxid de praseodim (III) (Pr₂O₃)

Starea de oxidare +4	Dioxid de carbon (CO₂) • Trioxid de carbon (CO₃) • Oxid de ceriu (IV) (CeO₂) • Dioxid de clor (ClO₂) • Oxid de crom (IV) (CrO₂) • Tetroxid de azot (N₂O₄) • Dioxid de germaniu (GeO₂) • Oxid de hafniu (IV) (HfO₂) • Oxid de plumb (IV) (PbO₂) • Oxid de mangan (IV) (MnO₂) • Dioxid de azot (NO₂) • Dioxid de plutoniu (PuO₂) • Oxid de rodiu (IV) (RhO₂) • Oxid de ruteniu (IV) (RuO₂) • Dioxid de seleniu (SeO₂) • Dioxid de siliciu (SiO₂) • Dioxid de sulf (SO₂) • Dioxid de telur (TeO₂) • Dioxid de thoriu (ThO₂) • Dioxid de staniu (SnO₂) • Dioxid de titan (TiO₂) • Oxid de wolfram (IV) (WO₂) • Dioxid de uraniu (UO₂) • Oxid de vanadiu (IV) (VO₂) • Dioxid de zirconiu (ZrO₂)

Starea de oxidare +5	• Pentoxid de stibiu (Sb₂O₅) • Pentoxid de arsen (As₂O₅) • Pentoxid de diazot (N₂O₅) • Pentoxid de niobiu (Nb₂O₅) • Pentoxid de fosfor (P₂O₅) • Pentoxid de tantal (Ta₂O₅) • Oxid de vanadiu (V) (V₂O₅)

Starea de oxidare +6	Trioxid de crom (CrO₃) • Trioxid de molibden (MoO₃) • Trioxid de reniu (ReO₃) • Trioxid de seleniu (SeO₃) • Trioxid de sulf (SO₃) • Trioxid de telur (TeO₃) • Trioxid de wolfram (WO₃) • Trioxid de uraniu (UO₃) • Trioxid de xenon (XeO₃)

Starea de oxidare +7	Heptoxid de diclor (Cl₂O₇) • Oxid de mangan (VII) (Mn₂O₇) • Oxid de reniu (VII) (Re₂O₇) • Oxid de technețiu (VII) (Tc₂O₇)

Starea de oxidare +8	Tetroxid de osmiu (OsO₄) • Tetroxid de ruteniu (RuO₄) • Tetroxid de xenon (XeO₄) • Tetroxid de iridiu (IrO₄) • Tetroxid de hasiu (HsO₄)

Altele	Superoxid · Peroxid · Oxocarbon · Suboxidă · Oxianion · Ozonuri ·

Oxizii sunt sortați după stările de oxidare ale elementului Categorie:Oxizi

Read other articles:

Carlos Alberto Carvalho dos Anjos Junior

Carlos Alberto Carvalho dos Anjos Junior Informasi pribadiTanggal lahir 15 September 1977 (umur 46)Tempat lahir BrasilPosisi bermain PenyerangKarier senior*Tahun Tim Tampil (Gol)2003-2011 Kawasaki Frontale 2012-2013 Kashima Antlers * Penampilan dan gol di klub senior hanya dihitung dari liga domestik Carlos Alberto Carvalho dos Anjos Junior atau Juninho (lahir 15 September 1977) adalah pemain sepak bola asal Brasil. Karier Juninho pernah bermain untuk Kawasaki Frontale dan Kashima Antler...

Kampanye Gurun Barat

Kampanye Gurun BaratBagian dari Kampanye Afrika Utara pada Perang Dunia KeduaInfanteri Australia sedang menjelajahi El Alamein, Oktober, 1942Tanggal11 Juni 1940 – 4 Februari 1943(2 tahun, 7 bulan, 3 minggu dan 3 hari)LokasiGurun Barat, Mesir dan Libya24°N 25°E / 24°N 25°E / 24; 25Koordinat: 24°N 25°E / 24°N 25°E / 24; 25Hasil Kemenangan sekutuPihak terlibat Kekaisaran Britania Britania Raya India &...

Bob Hastings

American actor (1925–2014) This article is about the actor. For the public relations professional with a similar name, see Robert T. Hastings Jr. Bob HastingsHastings in 2008BornRobert Francis Hastings(1925-04-18)April 18, 1925Brooklyn, New York, U.S.DiedJune 30, 2014(2014-06-30) (aged 89)Burbank, California, U.S.Resting placeForest Lawn Memorial Park, Hollywood Hills, California, U.S.[1]OccupationActorYears active1936–2013Spouse Joan Rice-Hastings (m....

List of current state governors in Mexico

This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: List of current state governors in Mexico – news · newspapers · books · scholar · JSTOR (May 2021) (Learn how and when to remove this template message) States governed by party as of November 2023 PRI PAN MORENA PVEM PE...

Temple de Marc-Aurèle

Temple de Marc-Aurèle (templum Divi Marci) Situation du temple de Marc-Aurèle, en haut à gauche, en face de la Colonne de Marc-Aurèle. En bas à droite de l'image, l'ustrinum de Faustine. Lieu de construction Regio IX Circus FlaminiusChamp de Mars, Rome Date de construction 175 apr. J.-C. - 180 Ordonné par Marc-Aurèle (si le temple est effectivement aussi dédié à Faustine) / Commode Type de bâtiment Temple romain Le plan de Rome ci-dessous est intemporel. Temple de Marc-Aurèle (tem...

FA Cup (Thailand) 2009

FA Cup (Thailand) 2009 Pokalsieger Thai Port FC Beginn 27. Juni 2009 Finale 21. Oktober 2009 Finalstadion Suphachalasai Stadium, Bangkok 2010 → Der Thailändische FA Cup 2009 begann am 27. Juni und endete mit dem Finale im Suphachalasai-Stadion in Bangkok, Thailand am 21. Oktober 2009. Er wird zum 14. Mal ausgespielt, zuletzt 2001.[1] Inhaltsverzeichnis 1 Allgemeine Information 2 Teilnehmende Mannschaften 2.1 Qualifikationsrunde 2.2 Erste Runde 2.3 Zweite Runde 2.4 Dritte Runde 3 Te...

Річкова ескадра Міссісіпі

Річкова ескадра Міссісіпі обстрілює укріплення конфедератів на Острові № 10 7 квітня 1862 року. Річкова ескадра Міссісіпі (англ. Mississippi River Squadron) — річкова ескадра Союзу, яка діяла на Міссісіпі та її притоках під час Громадянської війни у США. Вона була створена як формуван

Campeonato Mundial de Ginástica Rítmica

Os Campeonatos Mundiais de Ginástica Rítmica[1][2] são os campeonatos mundiais do esporte de ginástica rítmica. O torneio é promovido e organizado pela Federação Internacional de Ginástica (FIG). É um dos três torneios de ginástica rítmica organizados oficialmente pela FIG, assim como a Copa do Mundo de Ginástica Rítmica e as competições de ginástica nos Jogos Olímpicos (em colaboração com o COI e a federação do país organizador dos Jogos).[3] A primeira edição do Ca...

Tscherga

Dorf TschergaЧерга Föderationskreis Sibirien Republik Altai Rajon Schebalino Bevölkerung 1826 Einwohner(Stand: 14. Okt. 2010)[1] Höhe des Zentrums 480 m Zeitzone UTC+7 Telefonvorwahl (+7) 38849 Postleitzahl 649219 Kfz-Kennzeichen 04 OKATO 84 250 890 001 Geographische Lage Koordinaten 51° 34′ N, 85° 34′ O51.56666666666785.566666666667480Koordinaten: 51° 34′ 0″ N, 85° 34′ 0″ O Tscherga (Russlan...

Sint-Pieterskerk (Saive)

Sint-Pieterskerk De Sint-Pieterskerk (Église Saint-Pierre) is de parochiekerk van de tot de Belgische gemeente Blegny behorende plaats Saive, gelegen aan de Rue Mosty. Deze kerk werd omstreeks 1700 gebouwd in classicitische stijl. De kerk vormt een architecturale eenheid. Gebouw Het betreft een eenbeukige kerk met een versmald en verlaagd, driezijdig afgesloten koor. Het schip is opgetrokken in zandsteenblokken met kalksteen voor de omlijstingen en hoekbanden. De vierkante voorgebouwde toren...

قط بريطاني قصير الشعر

هذه المقالة تحتاج للمزيد من الوصلات للمقالات الأخرى للمساعدة في ترابط مقالات الموسوعة. فضلًا ساعد في تحسين هذه المقالة بإضافة وصلات إلى المقالات المتعلقة بها الموجودة في النص الحالي. (يوليو 2015) القط البريطاني قصير الشعر القط البريطاني قصير الشعر (بالإنجليزية: British Shorthair)‏ �...

The Park, Chennai

Luxury hotel in Chennai, India The Park ChennaiHotel chainThe Park HotelsGeneral informationLocationChennai, IndiaAddress601, Anna Salai, Near U.S. ConsulateChennai, Tamil Nadu 600 006Coordinates13°03′11″N 80°15′00″E / 13.052956°N 80.249923°E / 13.052956; 80.249923Opening15 May 2002OwnerThe Park HotelsManagementThe Park HotelsTechnical detailsFloor count12Design and constructionArchitect(s)Hirsch Bedner Associates, Los AngelesOther informationNumber of room...

Flipper's Guitar

Flipper's GuitarBackground informationAlso known asフリッパーズ・ギターLollipop SonicDouble Knockout CorporationOriginTokyo, JapanGenresShibuya-keialternative rockindie popYears active1987–1991LabelsPolystarPast membersKeigo OyamadaKenji OzawaShusaku YoshidaYasunobu ArakawaYukiko Inoue Flipper's Guitar (フリッパーズ・ギター) were a Tokyo-based rock band led by (and later a duo of) Keigo Oyamada and Kenji Ozawa. The band were influenced by the chirpy sound of British 80s ...

John Lennon discography

John Lennon discographyLennon being interviewed by Tom Snyder in 1975Studio albums11Live albums3Compilation albums15Video albums14Music videos64Singles23Box sets5 John Lennon was a British singer-songwriter and peace activist, best known as the co-founder of the Beatles. After three experimental albums with Yoko Ono, using tape loops, interviews, musique concrète, and other avant-garde performance techniques, Lennon's solo career properly began with the 1969 single Give Peace a Chance. Lenno...

Law of the Lawless (1964 film)

1964 film by William F. Claxton Law of the LawlessOriginal film posterDirected byWilliam F. ClaxtonWritten bySteve FisherProduced byA. C. LylesStarringDale RobertsonYvonne de CarloWilliam BendixCinematographyLester ShorrEdited byOtho LoveringMusic byPaul DunlapColor processTechnicolorProductioncompanyA.C. Lyles ProductionsDistributed byParamount PicturesRelease dates March 18, 1964 (1964-03-18) (Los Angeles) May 13, 1964 (1964-05-13) (United States) Runni...

Спам

У этого термина существуют и другие значения, см. Спам (значения). Спам (англ. spam) — массовая рассылка корреспонденции лицам, не выражавшим желания её получить. Распространителей спама называют спáмерами. В общепринятом значении термин «спам» в русском языке впервые ст...

48th Operations Group

48th Operations Group48th OG F-15E Strike Eagles over Stonehenge, Wiltshire, 2009Active15 January 1941 – 7 November 1945 10 July 1952 – 8 December 1957 31 March 1992 – presentCountry United StatesBranch United States Air ForcePart of48th Fighter WingGarrison/HQRAF LakenheathMotto(s)Vulneratus non Victus – Unconquered Even Though WoundedTail CodeLNEngagementsWorld War II, Antisubmarine, American TheaterWorld War II, EAME Theater Air Offensive, Europe Normandy Northern Fr...

Sakura shrimp

Species of crustacean Not to be confused with Cherry shrimp. Sakura shrimp Scientific classification Kingdom: Animalia Phylum: Arthropoda Subphylum: Crustacea Class: Malacostraca Order: Decapoda Suborder: Dendrobranchiata Family: Sergestidae Genus: Lucensosergia Species: L. lucens Binomial name Lucensosergia lucens(Hansen, 1922) Synonyms[1][2] Sergestes kishinouyei Nakazawa and Terao, 1915 Sergia lucens Hansen, 1922 Sergestes phosphoreus Kishinouye, 1925 Lu...

Sylvinite

A sedimentary rock made of a mechanical mixture of sylvite and halite For the gold-silver-tellurium mineral, see Sylvanite. Sylvinite from Perm Krai, Russia Close-up view of sylvinite from Perm, Russia Sylvinite is a sedimentary rock made of a mechanical mixture of the minerals sylvite (KCl, or potassium chloride) and halite (NaCl, or sodium chloride).[1][2] Sylvinite is the most important source for the production of potash in North America, Russia and the UK.[2][...

Women's rights in Saudi Arabia

Women's rights in Saudi ArabiaSaudi ambassador to the U.S. Princess Reema bint Bandar Al SaudGeneral StatisticsMaternal mortality (per 100,000)12 (2015)[1]Women in parliament19.9% (2016)[2]Women over 25 with secondary education77.2% (2020)[3]Women in labour force37.0% (2022)[4]Gender Inequality Index[5] (2021)Value0.247Rank59th out of 191 Global Gender Gap Index[6] (2022)Value0.636Rank127th out of 146 ...

Strategi Solo vs Squad di Free Fire: Cara Menang Mudah!