Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.


Types of reactions

No description

Harvey Buckle

on 28 October 2016

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Types of reactions

To know:
a. Combustion
b. Displacement
c. Thermal decomposition
To observe these chemical changes
Complete combustion:

Complete combustion needs a plentiful supply of air so that the elements in the fuel react fully with oxygen.
Fuels such as natural gas and petrol contain hydrocarbons. These are compounds of hydrogen and carbon only. When they burn completely:
the carbon oxidises to carbon dioxide
the hydrogen oxidises to water - remember that water, H2O, is an oxide of hydrogen
Incomplete combustion
Incomplete combustion occurs when the supply of air or oxygen is poor. Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide.
In general for incomplete combustion:
hydrocarbon + oxygen → carbon monoxide + carbon + water
The carbon is released as soot. Carbon monoxide is a poisonous gas, which is one reason why complete combustion is preferred to incomplete combustion. Gas fires and boilers must be serviced regularly to ensure they do not produce carbon monoxide.
Lets do it
Watch Mr Harvey
Bored with your iphone?
Fuels are substances that react with oxygen to release useful energy. Most of the energy is released as heat, but light energy is also released.
About 21 per cent of the air is oxygen. When a fuel burns in plenty of air, it receives enough oxygen for complete combustion.
Types of reactions
Two types!
Displacement reactions involve a metal and a compound of a different metal. In a displacement reaction:
a more reactive metal will displace a less reactive metal from its compounds
Displacement reactions are easily seen when a salt of the less reactive metal is in the solution.
Thermal decomposition
A reaction where something is heated and is broken down into at least TWO OTHER substances is called Thermal decomposition.
Full transcript