waheguru
  • waheguru
I have a question. When we do a hydrogen gas test, my teacher said the "popping" sound when a lit splint is placed in the test tube is a physical property - why? also when hydrogen does react with oxygen(when the lit splint is placed in the test tube containing hydrogen) does it form hydrogen peroxide The first quesiton is more important, the second is just for knowledge but please help me
Chemistry
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chestercat
  • chestercat
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cwrw238
  • cwrw238
well an explosion even if its just a pop is pretty physical, i would say!!. However seems more like chemical property to me - the splint starts a very fast reaction between hydrogen and oxygen where a lot of energy is released very quickye , hence the popping sound.
cwrw238
  • cwrw238
no the product of the reaction is water
waheguru
  • waheguru
but H2 + O2 make h202 right?

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anonymous
  • anonymous
The popping sound is because hydrogen gas is a combustion gas.
waheguru
  • waheguru
so its physical @sauravshakya
anonymous
  • anonymous
I guess yes.
cwrw238
  • cwrw238
no the equation for reaction is 2H2 + O2 = 2 H2O
waheguru
  • waheguru
also if something has a cumbustion reacition its reacting with oxygen right?
cwrw238
  • cwrw238
yep
waheguru
  • waheguru
so why doesnt water drop when we hear the pop sound @cwrw238
cwrw238
  • cwrw238
aahh - because of the high temperature - it is generated as water vapour. on cooling you might see some water in test tube. But it will be only a little.
waheguru
  • waheguru
thanks

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