Question #91cb4

1 Answer
Feb 28, 2016

Answer:

#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.