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液氢

此条目缺少或没有列出参考或来源,或者有未能查证的内容。 (2009年7月12日)维基百科所有的内容都应该可供查证,化学类条目亦需严谨。请协助添加来自可靠来源的引用以改善这篇化学类条目无法查证的内容可能被提出异议而移除。
液氢
IUPAC名
Liquid hydrogen
别名 Hydrogen (cryogenic liquid); hydrogen, refrigerated liquid; LH2, para-hydrogen
识别
CAS号 1333-74-0  checkY
PubChem 783
ChemSpider 762
SMILES
 
  • [HH]
InChI
 
  • 1/H2/h1H
UN编号 1966
ChEBI 33251
RTECS MW8900000
KEGG C00282
性质
化学式 H2
摩尔质量 2.02 g·mol−1
外观 Colorless liquid
密度 70.85 kg/m3(4.423 lb/cu ft)[1]
熔点 −259.14 °C(14.01 K;−434.45 °F)[2][1]
沸点 −252.87 °C(20.28 K;−423.17 °F)[2][1]
危险性
欧盟分类 Highly flammable (F+)
NFPA 704
4
3
0
CRYO
自燃温度 571 °C(1,060 °F)[2][1]
爆炸极限 LEL 4.0 %; UEL 74.2 % (in air)[2][1]
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。
储存液态氢的钢瓶

液氢(LH2),也称液态氢,是由氢气经由降温而得到的液体。液态氢须要保存在非常低的温度下(大约在20.268开尔文,-252.8[a]。它通常被作为火箭发射的燃料

液态氢可做为储存氢气的一种方式,因为液态氢比气态氢省空间。液态氢的密度大约为70.8千克每立方米 (在20开尔文[a]),密度很小,所以需要很大的容器来存储。

液氢中含99.79%的仲氢和0.21%的正氢

参见

参考资料

脚注
  1. ^ 1.0 1.1 20.268 K(−252.882 °C;−423.188 °F)
引用
  1. ^ 1.0 1.1 1.2 1.3 1.4 Thermophysical Properties of Hydrogen页面存档备份,存于互联网档案馆) , nist.gov, accessed 2012-09-14
  2. ^ 2.0 2.1 2.2 2.3 Information specific to liquid hydrogen 互联网档案馆存档,存档日期2009-07-17., harvard.edu, accessed 2009-06-12
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液氢
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