### process | oxidation:

Combustion
* All combustion produces NOx, because air is basically nothing but nitrogen and oxygen
  - requires an oxidizer, which is the air flowing through the engine
* Catalysts Several metals catalyze combustion of petroleum fuels.
* Most combustion creates pressure
  - involves oxygen
* Most combustion produces carbon dioxide
  - gases
  - greenhouse gases
  - provides energy
* Some combustion causes respiration.
* Some combustion consists of bonds
  - weak bonds
* Some combustion delivers gases
* Some combustion produces emissions
  - poison
  - products
  - vapor
  - water vapor
* also happens in forest fires.
* always produces water vapor.
* can produce noxious gases
  - toxic oxides of carbon
  - yield toxic oxides of carbon
* chemical process in which a substance reacts rapidly with oxygen and gives off heat
  - which releases energy
* chemical reaction between a carbon-containing fuel and oxygen in the atmosphere
* consumes valuable oxygen.
* drives most fires, and flames move at a speed related to how fast they consume material.
* generates air pollution
  - carbon monoxide and carbon dioxide
* generates toxic fumes
  - oxides of carbon and irritating aldehydes and ketones
* induced by compression ignition, theoretically occurs at a constant pressure.
* is also a major source of organochlorines
  - currently the only reaction used to power rockets
  - always and only to do with oxygen
* is an exothermic violent reaction between fuels and oxidizers
  - important energy-producing process
  - another practice that has helped reduce the amount of landfill space needed
  - chemical processes
* is often a complicated sequence of elementary radical reactions
  - hot enough that light in the form of either glowing or a flame is produced
  - reaction of a substance with oxygen in the air to produce heat and light
* is the act of burning
  - chemical combination of a substance with oxygen
  - exothermic process whereby the hydrocarbon is oxidised
  - main oxidation technique for industrial waste gas
  - oxidation of fuel
  - process by which chemicals combine to form new chemicals
  - rapid combination of oxygen with another material
  - used in many ways
* key element in many of modern society's critical technologies.
* occurs after some activation time, when the powder reaches a well defined critical state
  - predominantly in automobiles, homes, and in factories
  - when the elements in a fuel combine with oxygen to produce heat
* process that is central to the human civilisation.
* processes almost never completely exhaust all of the available fuel.
* produces carbon dioxide and other pollutants
* produces carbon monoxide, carbon dioxide and thick smoke
  - nitric oxide, vapours of isocyanate and hydrocyanic acid
  - irritating sulfur oxides
  - nitrogen and water vapor
* rapid chemical reaction, naturally occurring in nature and created by man.
* releases carbon dioxide, trace amounts of sulf ur oxides, and nitrogen oxides
* requires fuel and oxygen
  - fuel, oxygen and heat
  - oxygen to burn
* results in fire.
* takes place in the presence of air.
* type of oxidation reaction.
+ Oxygen, Uses of oxygen: Nonmetals
  * When an object or something burns or combusts, oxygen combines with another substance and releases heat and light. For instance, when you burn wood, the oxygen in air combines with the wood to create fire. This ability of oxygen has many uses. But, it also makes pure-oxygen very dangerous. If pure oxygen touches a flame or spark, it can combust and cause great damage. Combustion is used in many ways. For example, when oxygen is mixed with acetylene, it can create a very hot flame. The hot flame is used in welding, where metal is heated and melted together. Also, oxygen is used to create powerful fuels, which also can be used in rockets and jets.