To begin with, all matter has physical and chemical properties. Physical properties are defined as a substance changing without changing the chemical properties. The physical properties of gunpowder include the boiling point of potassium nitrate which is found in 673⁰ K and the melting point is 607⁰ K. Following ingredients inside of gunpowder (also known as black powder) are Sulfur (S), Charcoal, and Potassium nitrate …show more content…
One “catalyst” used when firing a gun, would be called Rifling. Rifling is when there are grooves inside the barrel of the gun causing the bullet/cartridges to spin clockwise or anticlockwise. This spin causes an increase in stability and accuracy. It also leaves characteristics on the cartridge itself. These markings on the bullet can be used to identify rifling and what weapon fired the bullet. Another type of catalyst used in firing weapons, is a choke, used on shotguns. A choke goes on the end of a shotgun barrel and it decreases the width of the barrel. This causes the shot not to spread and focuses the shot on the target, keeping it more accurate. (Firearms & Ballistics,