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).
The Universal Gas Constant-Ru-appears in the ideal gas law and can be expressed as the product between the Individual Gas Constant-R - for the particular gas-and the Molecular Weight-Mgas-for the gas, and is the same for all ideal or perfect gases : Ru = Mgas R (1). where. Ru = universal gas constant.