查看“︁过氧化钾”︁的源代码

{{Chembox
| verifiedrevid = 411123879
|   Name = 过氧化钾
|   ImageFile = K2O2-structure.jpg
|   ImageSize = 
|   ImageName = 
|   IUPACName = Potassium peroxide
|   OtherNames =
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 17014-71-0
| RTECS = 
| PubChem = 28202
| EINECS = 241-089-8
| SMILES = [O-][O-].[K+].[K+]
|  ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
| ChemSpiderID = 26237
|  InChI = 1/2K.O2/c;;1-2/q2*+1;-2
|  InChIKey = XXQBEVHPUKOQEO-UHFFFAOYAV
|  StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/2K.O2/c;;1-2/q2*+1;-2
|  StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
| StdInChIKey = XXQBEVHPUKOQEO-UHFFFAOYSA-N
  }}
|Section2 = {{Chembox Properties
|   Formula = K<sub>2</sub>O<sub>2</sub>
|   MolarMass = 110.196
|   Appearance = 白色至黄色无定形固体<ref name="GESTIS" />
|   Density = 2.14 g/cm<sup>3</sup><ref name="GESTIS">{{GESTIS|ZVG=500112|CAS=17014-71-0|Datum=3. Januar 2020}}</ref>
|   Solubility = 与水反应<ref name=hand>
{{cite book | last = Lide | first = David R. | year = 1998
 | title = Handbook of Chemistry and Physics
 | url = https://archive.org/details/isbn_9780849305948 | edition = 87 | publication-place = Boca Raton, FL | publisher = CRC Press
 | isbn = 0-8493-0594-2 | pages = 477; 520}}</ref><ref name="GESTIS" />
|   MeltingPt = 490°C（分解）<ref name="GESTIS" />
|   BoilingPt = 
  }}
| Section3 = {{Chembox Structure
|   CrystalStruct = [[正交晶系]]
|   SpaceGroup = Cmca, [[皮尔逊符号|oS16]]
| Coordination =
  }}
| Section4 = {{Chembox Thermochemistry
|   DeltaHf = -494.1 [[千焦每摩尔|kJ·mol<sup>-1</sup>]]
|   DeltaHc = 
|   Entropy = 102.1 J·mol<sup>-1</sup>·K<sup>-1</sup><ref name=hand/>
|   HeatCapacity = 
  }}
| Section7 = {{Chembox Hazards
|   NFPA-H = 3
|   NFPA-F = 0
|   NFPA-R = 1
|   NFPA-O = OX
|   EUClass = 
|   RPhrases = 
|   SPhrases = 
|   FlashPt = 
  }}
| Section8 = {{Chembox Related
|   OtherAnions = [[氧化钾]]<br />[[超氧化钾]]<br />[[氯化钾]]
|   OtherCations = [[过氧化锂]]<br />[[过氧化钠]]
  }}
}}

'''过氧化钾'''是一种[[无机化合物]]，化学式为<math>K_{2}O_{2}</math>。

过氧化钾与水反应产生[[氢氧化钾]]和[[氧]]气：

:<math>2 K_{2}O_{2} + 2 H_{2}O \rightarrow 4 KOH + O_{2}</math>

== 制备 ==
过氧化钾可以由[[钾]]与空气中[[氧气]]反应制得，同时还产生[[氧化钾]]和[[超氧化钾]]。<ref>{{Cite web |url=http://www.seilnacht.com/Lexikon/19Kalium.htm |title=Kalium bei Seilnacht |access-date=2021-05-24 |archive-date=2021-06-28 |archive-url=https://web.archive.org/web/20210628203458/https://www.seilnacht.com/Lexikon/19Kalium.htm }}</ref>

:<math>\mathrm{2\ K +\ O_2\longrightarrow\ K_2O_2}</math>

它也可以由氧化钾和氧气接触而成。

== 性质==
过氧化钾是一种黄白色固体，不会自己燃烧，但接触到可燃物就会剧烈反应。它遇水剧烈分解。<ref name="GESTIS" />

过氧化钾的[[标准摩尔生成焓]] ΔH<sub>f</sub><sup>0</sup> 为 −496&nbsp;kJ/mol。<ref name=wiberg1>{{Holleman-Wiberg|Auflage=101.|Startseite=1176}}</ref>

==参考资料==
{{reflist}}

{{钾化合物}}
{{多氧化物}}

{{DEFAULTSORT:Potassium Peroxide}}
[[Category:过氧化物]]
[[Category:钾化合物]]
[[Category:氧化剂]]
[[Category:易制爆化学品]]

{{inorganic-compound-stub}}