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 ∝ n
Charles 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 ∝ T
The combination of these three laws is: V ∝ (nT)/P
This law can be rearranged to: PV ∝ nT
The 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-1
Here 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.
Na(l) + 3N2(g)
The essential components of the system are an
ignition device and a pellet containing sodium azide. When activated, the system inflates and 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.
Which statement regarding the above chemical
reaction is true: