The ideal gas law - Safety air bag
Edited BY: Tali Lavy
Edit Date: 2016-08-16 19:34:23
 Question: Scientific Background:The simple gas laws describe the relationships involving the pressure, volume, temperature, and amount of an ideal gas.  Boyle’s law states that for a fixed amount of gas at a constant temperature, the gas volume is inversely proportional to the gas pressure.  V ∝ (1/P)Avogadro’s law states that the volume of a gas is proportional to the amount of the gas (at constant temperature and pressure. V ∝ nCharles law (also called Charles-Gay Lussac’s law) states that the volume of a fixed amount of gas at constant pressure is directly proportional to its temperature (in Kelvin). V ∝ TThe combination of these three laws is: V ∝ (nT)/PThis law can be rearranged to: PV ∝ nTThe proportional relationship can be written as equation: PV=nRT , where R is a proportional constant termed the gas constant.  The value of R (in SI unit) is:  R=8.3145 J mol-1  K-1SimulationHere is a simulation that simulates gas behavior Safety air bags One well known characteristic of gases in that the expand to fill their containers and assume the shape of their containers.  A practical application of these characteristics is the reaction that forms N2 (g) in an automobile air-bag safety system. This reaction utilizes the rapid decomposition of sodium azide. 2NaN3(s) à Na(l) + 3N2(g) The essential components of the system are a pellet containing sodium azide and an ignition device. When activated, the system inflates an air bag in a very short time (milliseconds range).  Note: the liquid sodium is converted to harmless solid sodium due to special additives that are also present initially. Picture credit:http://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/airbag1.htmQuestion:Which statement regarding the above chemical reaction is true: Question Created By: Tali Lavy Creation Date: 2016-08-16 18:52:04 View Question