Science Homework Help

I’m working on a chemistry writing question and need an explanation and answer to help me learn.

Airbags are a safety feature provided in most automobiles since the 1990s. The effective operation of an airbag requires that it rapidly inflate with an appropriate volume of gas when the vehicle is involved in a collision. When sensors in the vehicle detect a collision, an electrical current is passed through a carefully measured amount of sodium azide (NaN3) to initiate its decomposition. write a page describing the decomposition reaction of NaN3. What causes the airbag to inflate?