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What type of reaction is the following?

$\ce{ 10Na(l) + 2KNO3 (s) -> K2O(s) + 5Na2O(s) + N2 (g)}$

So far my best guess has been that it's a double replacement reactions with evolution of gas. Is this correct or am I totally lost?

Edit: It's not a double replacement reactions with evolution of gas (don't know why I thought it was), but what is it then?

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  • $\begingroup$ K2O won't be gaseous. I rewrote reaction to be readable but check your details. $\endgroup$ – Mithoron Aug 21 '16 at 11:30
  • $\begingroup$ My bad. K2O should be solid... $\endgroup$ – Christian S. O. Aug 21 '16 at 11:35
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    $\begingroup$ Now that's funny, if I added proper redox tag I would basically answer via tagging! So, yes it's redox, you could maybe call it also decomposition... $\endgroup$ – Mithoron Aug 21 '16 at 14:59
  • $\begingroup$ So what you are saying is that, it's a decomposition reaction? But couldn't you also say that a addition reaction is happening? Some of the oxygen has been separated from the Kaliumnitrate Binds with two of the Sodium to form Sodium Oxide? $\endgroup$ – Christian S. O. Aug 21 '16 at 15:41
  • $\begingroup$ Seems you're not getting it, there are redox reactions and the rest and no I think it shouldn't be called decomposition as two thing react and definitely not addition. Also I think that trying to put it into other categories than redox is waste of time. $\endgroup$ – Mithoron Aug 21 '16 at 19:03

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