Gunpowder's burning rate increases with pressure, so it will burst containers but just burns in the open. Ignition of the powder packed behind a bullet must generate enough pressure to force it from the muzzle at high speed, but not enough to rupture the gun barrel.
The gas constant occurs in the ideal gas law, as follows: where P is the absolute pressure (SI unit pascals), V is the volume of gas (SI unit cubic metres), n is the amount of gas (SI unit moles), m is the mass (SI unit kilograms) contained in V, and T is the thermodynamic temperature (SI unit kelvins).
Boyle's gas law states the volume of a gas is inversely proportional to the pressure of the gas when the temperature is held constant. This example problem uses Boyle's law to find the volume of a gas when pressure changes. Boyle's Law Example Problem. A balloon with a volume of 2.0 L is filled with a gas at 3 atmospheres.