Automobile airbags contain solid sodium azide, NaN3, that reacts to produce nitrogen gas when heated, thus inflating the bag. 2 NaN, (s) - 2 Na(s) + 3 N,(g) Calculate the value of work, w, for the system if 28.3 g NaN, reacts completely at 1.00 atm and 22 °C. w = J

Chemistry & Chemical Reactivity
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Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
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Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section: Chapter Questions
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Automobile airbags contain solid sodium azide, NaN3, that reacts to produce nitrogen gas when heated, thus inflating the bag.
2 NaN3 (s) 2 Na(s) + 3 N, (g)
Calculate the value of work, w, for the system if 28.3 g NaN, reacts completely at 1.00 atm and 22 °C.
w =
J
Transcribed Image Text:15 of 20 Automobile airbags contain solid sodium azide, NaN3, that reacts to produce nitrogen gas when heated, thus inflating the bag. 2 NaN3 (s) 2 Na(s) + 3 N, (g) Calculate the value of work, w, for the system if 28.3 g NaN, reacts completely at 1.00 atm and 22 °C. w = J
Expert Solution
Step 1

Given data:

Mass of NaN3 = 28.3 gms                    Molar mass = 65 gm/mol

Pressure = 1 atm

Temperature = 22°C = 295

The reaction for the process is :

2NaN3(s)    2Na(s)  +  3N2(g)

Number of moles=Given massMolar mass=28.365=0.435 moles

According to the reaction, 2 moles of NaN3 yields 3 moles of N2.

So 0.435 moles of NaN3 will yield 32×0.435=0.65 moles

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