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Combustion Reactions 7.10

Combustion Reactions 7.10. By: Noelle Raj & Michelle Quach. What is a Combustion Reaction?. Combustion, is the succession of exothermic chemical reactions between a fuel and an oxidant with heat. The release of heat can result in the production of light in the form of glowing or a flame.

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Combustion Reactions 7.10

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  1. Combustion Reactions7.10 By: Noelle Raj & Michelle Quach

  2. What is a Combustion Reaction? • Combustion, is the succession of exothermic chemical reactions between a fuel and an oxidant with heat. The release of heat can result in the production of light in the form of glowing or a flame.

  3. Diagram! • This diagram shows the chemical equation for methane.

  4. Hydrocarbons! • Combustion reactions may involve hydrocarbons. • Hydrocarbons are compounds of hydrogen and carbon. • The complete combustion of a hydrocarbon results in carbon dioxide and water.

  5. Another Diagram! • Combustion reactions always involve oxygen, O2. Anytime anything burns, it is a combustion reaction. Combustion reactions are almost always exothermic. For example, when wood burns, it must do so in the presence of O2 and a lot of heat is produced.

  6. Balancing Equations! • Balance this equation: C6H6(l) + O2(g)  CO2(g) + H2O(g) • Your answer should be: 2C6H6(l) + 15O2(g)  12CO2(g) + 6H2O(g)

  7. Combustion Reaction Equations! • Balance these equations: 1. C2H8 + O2 CO2 + 4H2O Your answers should be: 1. C2H8 + 4O2 2CO2 + 4H2O

  8. Did You Know? • Smoldering- Smoldering is the slow, low-temperature form of combustion. It is a typically incomplete combustion reaction. Solid materials that can keep a smoldering reaction are coal, wood, cotton, tobacco, humus, synthetic foams, and dust. • Rapid- Rapid combustion is otherwise known as fire, in which large amounts of heat and light energy are released, which often results in flames. Sometimes, a large volume of gas is freed in combustion besides the production of heat and light. The sudden evolution of big amounts of gas creates a lot of pressure that makes a loud noise. Such a combustion is known as an explosion. • Microgravity- Combustion processes behave differently in a microgravity environment than in Earth-gravity because of the lack of buoyancy. For example, a candle's flame takes the shape of a sphere.

  9. Review! • What substance is common to all combustion reactions? • Oxygen. • Name the products of the combustion of a hydrocarbon. • CO2 and H2O

  10. Helpful Websites! • www.iun.edu/~cpanhd/.../chemical%20reactions/combustion.html • http://misterguch.brinkster.net/6typesofchemicalrxn.html • http://www.elmhurst.edu/~chm/vchembook/511natgascombust.html

  11. Homework! • CH3CH2OH  +  O2  CO2  +  H2O • C3H8 + O2H2O + CO2

  12. The End

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