What Happens When H2 and O2 Particles Interact Without a Catalyst?

[Quadruple Bypass]

i studied chemistry about 6 years ago and don't remember much

I have a question though, let's say that you have a room and you put a partition in the middle of it. On one side is H2 and on the other is O2. Now if you remove this partition, do the H2 and O2 particles start to react with each other to form water or do you have to have some sort of catalyst to start this reaction (like a spark)?

 

[Quadruple Bypass]

Errr, just got my answer, never mind this thread!

 

[Borek]

Activation energy being the keyphrase...

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methods

 

[manzoor]

Can you please tell the answer?

 

[Borek]

Do you know activation energy is?

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methods