We’re being asked to calculate the work for the system if 33.2 g of NaN3 reacts completely at 1.00 atm and 22 ˚C.
The given reaction is:
2 NaN3(s) → 2 Na(s) + 3 N2(g)
Recall that work (w) is given by:
P = pressure (in atm)
ΔV = Vfinal – Vinitial = change in volume (in L)
Also note that if work is:
• (+): work is done by the surroundings to the system (compression)
• (–): work is done by the system to the surroundings (expansion)
Automobile airbags contain solid sodium azide, NaN3, that reacts to produce nitrogen gas when heated, thus inflating the bag.
2NaN3 (s) → 2Na (s) + 3N2 (g)
Calculate the value of work (w) in J, for the following system if 33.2 g of NaN3 reacts completely at 1.00 atm and 22 °C.
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