It's just a curiosity.

 

When the hydrogen ignites during the explosive reaction Na + H2O*

* 2Na + 2H2O --> 2NaOH + H2

Can the Na that didn't react yet, react with O2 of the fire?

4Na + O2 --> 2Na2O

And produce sodium oxide which would fall on water and producce NaOH?

 

I remember I've put it in a Chemistry Lab Report and the teacher did not understand why did I 'invent' it...

 

Can't it happen?

What are the enthalpies of formation for those reactions/products?

I'm sorry, I don't have enough knowledge to answer about the enthalpies =\

yes, sodium will burn in air quite nicely when heated (as generated by the reaction with water).

The flame is typically yellow due to the presence of sodium so I think it's fair to assume that at least some of the sodium vapour burns.

Thanks. That was my doubt ;D

Now it isnt anymore.