NASCAR vehicles are equipped with extremely durable materials and an extremely powerful engine. The materials of the car are made with some organic materials and the engine machinery is fabricated in a way that allows the engine pistons to move extremely fast all while the car moves at speeds close to 300 km/hour (180mph). The tires are specially designed for NASCAR vehicles based on the intensity and speed of the car. Due to the speed of the car, the pistons in the engines must be able to accommodate the extreme speeds and there is a chemical reaction that must go on inside of the engine. Inside, there is a mixture of air and gasoline which becomes ignited by a spark from a spark plug. The octane inside of the gasoline is what produces an extremely exothermic reaction. The tires of a stock car are very different than those on any of our cars. They have no tread, they are a quarter of an inch thick, they are filled with nitrogen and in a single race, any one driver may go through 40 tires. The reason the tires are underinflated once they are first put onto a car is because of Gay-Lussac's Law, which states that the pressure of a gas increases as the temperature goes up. The kinetic energy of the particles increases, which increases the number of collisions, which in turn, increases the pressure. The article is a true to life example of the octane multi-step question done in class. The article also mentions exothermic reactions as well as temperature and pressure. The article may also be related to the organic chemistry unit regarding the many organic materials used to create countless elements of the stock car.