(As you can guess, different fuels begin burning at different temperatures.) Heat or ignition sources lift fuel (combustible material) to its activation energy to start the fire. The fire generates heat which sustains the chemical reaction; the blaze continues and spreads. Some firefighting tactics shield the fuel from air (oxygen) to extinguish the blaze. Carbon dioxide fire extinguishers expel a cold fog of CO2 that cuts a fire off from its air supply.
In force and spark compositions, potassium nitrate, sulfur, and finely ground charcoal are used, with additional ingredients that produce various types of sparks. In flame compositions, such as the stars that shoot out of rockets, potassium nitrate, salts of antimony, and sulfur maybe be used. For colored fire, potassium chlorate or potassium perchlorate is combined with a metal salt that determines the color. Inside each firework are small packets filled with chemicals, mainly metal salts and metal oxides, which react to produce an array of colors. When heated, the atoms of each element in the mix absorb energy causing its electrons to rearrange from their lowest energy state to a higher excited state.
As you would already know that exothermic reactions tend to release quite a large amount of heat, so when the reaction mixture gets very warm, a very hot exothermic reaction begins. [2] How industry controls the risks of thermal runaway reaction/ Protective measures used for consequences of runaway reactions. “Protective measures include emergency venting or relief systems, inhibition and containment.”[3] Bibliography: 1) http://writepass.co.uk/journal/2012/11/thermal-runaway-reactions-are-characterised-by-progressive-increases-in-the-rate-of-heat-generation-temperature-and-pressure/ 2) http://wall-paper3.blogspot.co.uk/2011/12/why-do-you-think-thermal-runaway.html 3)
Starting at the bottom we have a lifting charge which contains good ole black powder. The lifting charge gets the party started by creating an explosion after it is ingnited by the fuse. An explosion occurs which produces hot rapidly expanding gases . This is an example of the “Law of Volumes” which is an experimental gas law which describes how gases tend to expand when heated. Since all the kenetic energy is contained in a tube the shell has no place to go but up.
Describe the appearance of the flame when the air vents are opened. When the air vents (collar) are opened, the air mixes with the gas and makes a more complete combustion reaction. This results in a hotter reaction, with a light blue colored flame. 6. What apparatus is used in this demo to test how hot the flame is?
In order to understand the lab one must also understand endothermic and exothermic reactions. When a solid dissolves in water heat is either absorbed or released, which results in either an endothermic or exothermic reaction. An endothermic reaction is defined as the process in which energy, as heat, flows from the surrounding into the system. While an exothermic reaction is defined as the process in which energy, as heat, flows out of the system into the surroundings. When an endothermic reaction occurs, heat it taken in making the pack cool down, and in an exothermic reaction occurs heat is released making the pack warm up.
In addition to all of the pros that comes with the navy like any career it has its cons. While assisting in making the world a better place fire fighting can be an exremely dangerous health risk. I dont feel as if the equipmant used protects against all risks of health issues. To help improve the protection of the equipment extensive test can be done
Even though there are people against fracking, the opposites consider that it could be good because it will create jobs, Americans could have their own energy and the U.S.A will use less coal. People who are against fracking claim that it has negative environmental consequences. The drillers use acids such as Boric Oxide and Hydrochloric that are used to clean swimming pool filters. Moreover, they use detergents one of them is Sodium Hydroxide.pH buffer. It is very corrosive and causes severe burns.
At the same time infrared sensors will be detecting heat, like the heat from a vehicles engine. With this combination, the skeets will detonate and shoot “explosively-formed-penetrators,” (EFP’s) towards the target at very high speeds. Once these reach the target, they will destroy it, not by blowing up, but through the kinetic energy of the EFP, because it moves so fast. The XM307 Advanced Crew Served Weapon, (ACSW) is a gun in development. It has a 25mm belt-fed grenade machine gun.
It can create jobs further down the line, reduce the carbon footprint of a company, and generate revenue for the towns around the dig sites. However, the dig also poses threats such as a lower housing market around the dig sites, air pollution, ground water contamination, and earthquakes. So, in the end, fracking does have its risks and some good