1 / 11

Chemistry of Firefighting & Composites

Chemistry of Firefighting & Composites. Julia, Nina, and Nicole. The Chemistry of Firefighting. 20,000 people die in uncontrolled fires in North America each year

erv
Download Presentation

Chemistry of Firefighting & Composites

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chemistry of Firefighting & Composites Julia, Nina, and Nicole

  2. The Chemistry of Firefighting • 20,000 people die in uncontrolled fires in North America each year • Firefighters in the U.S. were called out on 362,500 house fires in 2009, which caused 12,650 injuries, 2,565 fatalities and $7.6 billion in property damage • People need to know how to put out these fires properly • There are 3 ways to extinguish a fire: • Cooling the fuel • Cutting off the supply of oxygen • Trapping the combustion intermediates

  3. The Chemistry of Firefighting Cont. • Class A Fire- A fire in which the fuel is a solid • Class B Fire- A fire in which the burning material is a liquid or gas • Class C Fire- A fire involving an electrical current • Class D Fire- A fire in which a metal is burning

  4. Cutting off the Oxygen Supply 2NaHCO₃(s) + heat Na₂CO₃(s) + H₂O (g) + CO₂ (g)

  5. Halons • Halons- a class of fire extinguishing agents that are used in automatic sprinkling systems to protect sensitive electronic equipment • Used in computers and aircraft fire extinguishers • Puts out fire quickly leaving no residue

  6. What class of fire is a tree when it’s burning, and how do you put it out? Class A, Water

  7. Composites • Composites are made by embedding fibers in a plastic base (these fibers include glass, graphite, or synthetic fabrics like nylon) • They are less dense than metals • They are non-corrosive • They absorb vibrations well • Made up of two or more materials

  8. Benefits/Uses of Composites • Weigh less • Cars made of composites use less fuel • They are stronger and more protective • Composite cars are quieter and smoother riding • They do not rust

  9. Fiberglass and Lumber • Fiberglass was one of the first composites to be manufactured • Lumber is the newest composite being manufactured • It can be cut and nailed • It is stronger than real wood

  10. Name 3 Benefits of Using Composites • Saves money • Not heavy • Stronger/safer

  11. Homework • What are 5 composites in your house? • Classify these fires: • A wooden picture frame • Grease fire • A metal pole • A telephone wire • If there is a kitchen fire with your gas stove why shouldn’t you cool the fire by pouring water on it?

More Related