Why do Nitrogen dioxide and hydrogen gas react with each other?

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Nitrogen tends to react rather than remain in its elemental form due to its higher electronegativity compared to hydrogen. When nitrogen reacts, it forms a polar bond by effectively taking an electron from hydrogen, resulting in a more stable configuration. This reaction is thermodynamically favorable as it minimizes free energy, which is a key indicator of spontaneous reactions. The tendency to achieve a lower energy state drives the reactivity of nitrogen in forming bonds.
AakashPandita
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Why don't they tend to stay as they are?
 
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Nitrogen is more electronegative, and when reacted, can form a polar bond, in which it basically takes the electron from the hydrogen molecule. This is more stable and thermodynamically favorable.

You could also say that it minimizes the free energy, which is the indicator of whether a reaction will occur spontaneously.
 

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