Automobile airbags

What is the minimum amount of sodium azide, NaN3, that can be added to an automobile airbag to give a volume of 20.0 L of N2(g) on inflation Make any reasonable assumptions required to obtain an answer, but state what these assumptions are. 

An example of a technical contradiction is provided by an automobile airbag, which needs to deploy very fast in order to protect the occupant (good) but the faster it deploys the more likely it is to kill small people (bad). An example of a physical contradiction is provided by coffee that should be hot to be enjoyable but cold enough not to scald the customer. 

Most automobile airbags contain sodium azide (NaNj) as the propellant. When accelerometers detecta crash, the electronic controllerfiresthe charge of sodium azide. Sodium azide decomposes explosively, generating nitrogen gas that fills the airbag. 

The reaction between solid sodium and iron(lll) oxide is one in a series of reactions that inflates an automobile airbag. 

The reaction between solid sodium and ironQII) oxide is one in a series of reactions that inflates an automobile airbag 6Na[s3 + Fe203[s) — 3Na20[s) + 2Fe[s). If 100.0 g of Na and 100.0 g of Fe203 are used in this reaction, determine the following. 

Because pure gas is dry, easily produced, and safe to breathe, it is the gas of choice for automobile airbags and nonfluorescent lightbulbs. Because it is less sensitive to pressure changes than air, pure nitrogen gas is typically used to fill race car and aircraft tires. 

Sodium azide is best known as the chemical found in automobile airbags. An electrical charge triggered by automobile impact causes sodium azide to explode and release nitrogen gas inside the airbag. 

CDC has received no reports of sodium azide exposure following automobile airbag deployment. 

Sodium azide is a highly toxic, white crystalline solid. It has come into widespread use in automobile airbags its explosive decomposition to nitrogen gas provides rapid inflation of the airbag. In addition, sodium azide is used in the production of metallic azide explosives and as a preservative in laboratories. It has no current medical uses, but because of its potent vasodilatory effects, it has been evaluated as an antihypertensive agent,... 

II. Toxic dose. Although several grams of azide are found in an automobile airbag, it is completely consumed and converted to nitrogen during the explosive inflation process, and toxicity has not been reported from exposure to spent airbags. 

Sodium azide, NaN3, decomposes explosively to sodium metal and nitrogen gas and is used in automobile airbags. 

The production of nitrogen gas for automobile airbags takes advantage of the following chemical reaction ... 

With the rapid development of electronics and microprocessing, microelectronics such as microsensors, micromotors, and MEMSs have made great strides. Their global market, which includes products such as automobile airbag systems, display systems, and ink-jet cartridges, exceeded US 40 billion in 2006 according to Global MEMS/Microsystems Markets and Opportunities. In 2013, it was double that amount. 

Betterton EA (2003) Environmental fate of sodium azide derived from automobile airbags. Crit Rev Environ Sci Technol 33 423-458... 

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