Question #91cb4

1 Answer
Feb 28, 2016

2NaN_3(s) rarr 2Na(s) + 3N_2(g). Dinitrogen volume is approx. 34 L.

Explanation:

This reaction is apparently used to fill car air bags in the event of an accident. If there are (60.0*g)/(65.01*g*mol^-1) = 0.923 mol, sodium azide, 1.38 mol dinitrogen gas are evolved.

Now, I assume a standard temperature of 298 K and a standard pressure of 1 atm (perhaps this is unjustified, but further information is absent). Under these circumstances, 1 mol of gas has a volume of 24.5 L. Under other conditions of temperature I could use the Ideal Gas equation: V=(nRT)/P.

So, 24.5 L*mol^-1 xx 1.38 mol = ?? L. Hopefully this is enough volume to stop your nut being banged into the dashboard.