Is there a known gas that would combust by there mere action of mixing with oxygen? So, we could put this hypothetical gas in a balloon, and if the balloon popped, it would combust and explode.

closed as too broad by A.K., Jon Custer, Mithoron, airhuff, aventurin Oct 18 at 16:32

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    Phosphine - PH3 – Waylander Oct 16 at 21:41
  • Well, any pyrophoric gas would do. Phosphine is just one of them. – Jon Custer Oct 16 at 21:49
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    @user69077 Phosphine, silane, borane. – A.K. Oct 16 at 21:58
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    Disilane is way more exciting than silane. – Jon Custer Oct 16 at 22:03
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    Dichlorosilane will go too – Waylander Oct 16 at 22:04

Edit: Many gasses have this capability, called pyrophoric gasses. These include Phosphine, silane, borane, and more

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    Note that phosphine is not an element, it is a molecule. – Jon Custer Oct 16 at 21:50
  • To nitpick phosphine isn't an "element" but rather a "compound." – MaxW Oct 16 at 21:51
  • Thank you, I didn't realize I had put element. – user69077 Oct 16 at 21:52

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