Chemistry

Write the balanced chemical equation for the decomposition of sodium azide. If this is a redox reaction, show half reactions and determine if spontaneous. The chemical equation is 2NaN3(s) -> 2Na(s)+3N2(g) right? I am confused on the oxidation states for NaN3... please explain!

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  1. On the left side,
    Na is +1
    Each N in NaN3 is -1/3

    On the right side, Na is zero, N in N2 is zero.

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