2 NaN3(s) 2 Na(s) + 3 N2(g) ?
Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction.
2 NaN3(s) 2 Na(s) + 3 N2(g)
What mass of NaN3(s) must be reacted to inflate an air bag to 66.5 L at STP? g
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While i'm not the best at this, I'll give it a try (can't promise it's right though). Assuming it's 66.5 Litres....
At STP, I believe that 1 mole of gas takes up 24dm3.
66.5/24=2.77 moles.
Since this is accounting for the N2 gas, we convert it using the equation -
2.77/3*2 (simplest way to type it)
That makes about 1.85 moles.
To convert that to Mass, we use Mass = Moles x RFM
=1.85*65.01
=0.028g
Again, i'm unsure how correct that is, but it's my best guess, I might have gone wrong somewhere. In reality, the reaction happens at a high temperature and pressure, so that'd need to be taken into account.