1 / 20

Fuels

Fuels. Intermediate 2 Chemistry Unit 2(a). Fuels and combustion. A fuel is “a substance which is burned to release energy”. “Combustion” is another word for “burning”. Burning requires oxygen (O 2 ). Enough fuel for 4 billion more years. Burning fuels.

caldwell-humphrey
Télécharger la présentation

Fuels

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. Fuels Intermediate 2 Chemistry Unit 2(a)

  2. Fuels and combustion • A fuel is “a substance which is burned to release energy”. • “Combustion” is another word for “burning”. • Burning requires oxygen (O2). Enough fuel for 4 billion more years

  3. Burning fuels • When a substance burns ALL of the different types of atom in it react with oxygen

  4. Equations Write word and chemical equations for the following substances burning: • Methane (CH4) • Glucose (C6H12O6) • Hydrogen (H2) • Ethanol (C2H5OH) • Carbon • *Coal (contains carbon, hydrogen and sulphur) – no need for a chemical equation here

  5. Hydrocarbons A hydrocarbon is “a substance which contains hydrogen and carbon ONLY”. Which of the following substances are hydrocarbons? • Methane (CH4) • Glucose (C6H12O6) • Hydrogen (H2) • Ethanol (C2H6O) • Carbon

  6. Testing for the products of combustion Cobalt chloride paper Lime water

  7. Types of combustion • Look at a Bunsen burner and the different types of flame. • There are 2 types of combustion • complete and incomplete

  8. Hydrocarbon + oxygen carbon dioxide water + Hydrocarbon + oxygen carbon monoxide water + carbon + Complete combustion Incomplete combustion

  9. Carbon Dioxide vs Monoxide

  10. Cars and pollution • Cars burn petrol (C8H18) • Petrol sometimes contains sulphur compounds • What products of combustion will come out of the exhaust?

  11. Sulphur dioxide • SO2 • Dissolves in rain water to produce acid rain

  12. Cars and pollution 2 • Nitrogen monoxide and nitrogen dioxide also come out the exhausts of cars • They also cause acid rain • Where do they come from?

  13. N N O O Nitrogen and Oxygen N2 O2 • A high-energy spark from the engine spark plug allows N2 and O2 to react. • Oxides of nitrogen (NO, NO2 etc) are produced.

  14. Alternative Fuels

More Related